Annual report pursuant to Section 13 and 15(d)

Long-Term Debt - Additional Information (Details)

v3.6.0.2
Long-Term Debt - Additional Information (Details)
 1 Months Ended 12 Months Ended 13 Months Ended
Dec. 22, 2016
USD ($)
Aug. 04, 2016
USD ($)
bank
Jun. 30, 2015
USD ($)
bank
Mar. 31, 2010
USD ($)
Sep. 30, 2015
USD ($)
Oct. 31, 2012
USD ($)
bank
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Mar. 31, 2010
USD ($)
Nov. 30, 2016
USD ($)
Nov. 18, 2016
USD ($)
Nov. 01, 2016
USD ($)
Oct. 03, 2011
USD ($)
Mar. 31, 2011
USD ($)
Feb. 28, 2009
USD ($)
Jan. 30, 2006
USD ($)
Tranche
Line of Credit Facility [Line Items]                                  
Long-term debt value, carrying value             $ 165,413,000 $ 119,220,000                  
Payments on long-term debt             14,014,000 12,392,000 $ 18,392,000                
13.000% construction loan payable, due May 2017 | Term Loan                                  
Line of Credit Facility [Line Items]                                  
Original principal amount $ 10,694,000                                
Long-term debt value, carrying value             $ 9,503,000 0                  
Stated interest rate 13.00%           13.00%                    
Subjective acceleration clause, repayment period 60 days                                
6.345% variable rate construction term loan payable in semi annual installments through February 26, 2021                                  
Line of Credit Facility [Line Items]                                  
Stated interest rate                                 6.345%
6.345% variable rate construction term loan payable in semi annual installments through February 26, 2021 | Term Loan                                  
Line of Credit Facility [Line Items]                                  
Original principal amount                                 $ 3,240,000
Effective interest rate             2.998%                    
6.345% variable rate construction term loan payable in semi annual installments through February 26, 2021 | Term Loan | Minimum                                  
Line of Credit Facility [Line Items]                                  
Long-term debt value, carrying value             $ 96,000                    
6.345% variable rate construction term loan payable in semi annual installments through February 26, 2021 | Term Loan | Maximum                                  
Line of Credit Facility [Line Items]                                  
Long-term debt value, carrying value             275,000                    
Variable rate construction to term loan payable in quarterly installments through December 2024 | Term Loan                                  
Line of Credit Facility [Line Items]                                  
Original principal amount                                 $ 17,156,000
Long-term debt value, carrying value             $ 10,139,000 11,644,000                  
Number of tranches | Tranche                                 2
Variable rate construction to term loan payable in quarterly installments through December 2024 | Variable rate construction to term loan                                  
Line of Credit Facility [Line Items]                                  
Effective interest rate             4.248%                    
6.345% term loan payable in semi-annual installments through June 2024 | Term Loan                                  
Line of Credit Facility [Line Items]                                  
Original principal amount                                 $ 13,081,000
Long-term debt value, carrying value             $ 9,096,000 9,822,000                  
Stated interest rate             6.345%                    
Effective interest rate             2.748%                    
6.345% term loan payable in semi-annual installments through June 2024 | Term Loan | Minimum                                  
Line of Credit Facility [Line Items]                                  
Principal payments due in quarterly installments             $ 326,000                    
6.345% term loan payable in semi-annual installments through June 2024 | Term Loan | Maximum                                  
Line of Credit Facility [Line Items]                                  
Principal payments due in quarterly installments             1,179,000                    
6.345% term notes payable in semi annual installments Due February 2021 and June 2024 | Term Loan                                  
Line of Credit Facility [Line Items]                                  
Long-term debt value, carrying value             10,578,000 11,549,000                  
Construction loans | Term Loan                                  
Line of Credit Facility [Line Items]                                  
Original principal amount       $ 27,868,000           $ 27,868,000              
Principal payments due in quarterly installments       $ 2,424,000                          
Payments on long-term debt                 $ 3,712,000                
Construction loans | Term Loan | Minimum                                  
Line of Credit Facility [Line Items]                                  
Principal payments due in quarterly installments             109,000                    
Construction loans | Term Loan | Maximum                                  
Line of Credit Facility [Line Items]                                  
Principal payments due in quarterly installments             1,149,000                    
Construction loans | Variable rate construction to term loan                                  
Line of Credit Facility [Line Items]                                  
Original principal amount                               $ 37,906,000  
Draws on line of credit                   $ 27,868,000              
6.500% term loan payable in monthly installments through October 2017 | Term Loan                                  
Line of Credit Facility [Line Items]                                  
Original principal amount             755,000                    
Long-term debt value, carrying value             $ 110,000 234,000                  
Stated interest rate             6.50%                    
Principal payments due in quarterly installments             $ 11,000                    
7.250% term loan payable in quarterly installments through March 2021 | Term Loan                                  
Line of Credit Facility [Line Items]                                  
Original principal amount                             $ 5,500,000    
Long-term debt value, carrying value             $ 2,651,000 3,208,000                  
Stated interest rate             7.25%               7.25%    
7.250% term loan payable in quarterly installments through March 2021 | Term Loan | Minimum                                  
Line of Credit Facility [Line Items]                                  
Principal payments due in quarterly installments             $ 144,000                    
7.250% term loan payable in quarterly installments through March 2021 | Term Loan | Maximum                                  
Line of Credit Facility [Line Items]                                  
Principal payments due in quarterly installments             171,000                    
6.110% term loan payable in monthly installments through June 2028 | Term Loan                                  
Line of Credit Facility [Line Items]                                  
Original principal amount                           $ 7,380,000      
Long-term debt value, carrying value             $ 4,591,000 4,772,000                  
Stated interest rate             6.11%             6.11%      
6.110% term loan payable in monthly installments through June 2028 | Term Loan | Minimum                                  
Line of Credit Facility [Line Items]                                  
Principal payments due in quarterly installments             $ 0                    
6.110% term loan payable in monthly installments through June 2028 | Term Loan | Maximum                                  
Line of Credit Facility [Line Items]                                  
Principal payments due in quarterly installments             70,000                    
Variable rate construction to term loan payable in quarterly installments through June 2020 | Term Loan                                  
Line of Credit Facility [Line Items]                                  
Original principal amount           $ 47,234,000                      
Long-term debt value, carrying value             $ 35,679,000 38,401,000                  
Effective interest rate             3.998%                    
Debt instrument, number of banks | bank           2                      
Variable rate construction to term loan payable in quarterly installments through June 2020 | Term Loan | Minimum                                  
Line of Credit Facility [Line Items]                                  
Principal payments due in quarterly installments             $ 389,000                    
Variable rate construction to term loan payable in quarterly installments through June 2020 | Term Loan | Maximum                                  
Line of Credit Facility [Line Items]                                  
Principal payments due in quarterly installments             903,000                    
Variable-rate construction and term loans due 2038 | Term Loan                                  
Line of Credit Facility [Line Items]                                  
Long-term debt value, carrying value             $ 19,877,000                    
Variable-rate construction and term loans due 2038 | Variable rate construction to term loan                                  
Line of Credit Facility [Line Items]                                  
Original principal amount         $ 20,746,000                        
Long-term debt value, carrying value               17,663,000                  
Effective interest rate             3.498%                    
Variable-rate construction and term loans due 2038 | Variable rate construction to term loan | Minimum                                  
Line of Credit Facility [Line Items]                                  
Principal payments due in quarterly installments         105,000                        
Variable-rate construction and term loans due 2038 | Variable rate construction to term loan | Maximum                                  
Line of Credit Facility [Line Items]                                  
Principal payments due in quarterly installments         $ 835,000                        
4.950 due July 1, 2013 | Term Loan                                  
Line of Credit Facility [Line Items]                                  
Original principal amount   $ 4,837,000                              
Long-term debt value, carrying value             $ 4,616,000                    
Stated interest rate   4.95%                              
Debt instrument, number of banks | bank   2                              
4.950 due July 1, 2013 | Term Loan | Minimum                                  
Line of Credit Facility [Line Items]                                  
Principal payments due in quarterly installments   $ 43,000                              
4.950 due July 1, 2013 | Term Loan | Maximum                                  
Line of Credit Facility [Line Items]                                  
Principal payments due in quarterly installments   $ 156,000                              
8.750% construction loan payable, due March 2018 | Term Loan                                  
Line of Credit Facility [Line Items]                                  
Original principal amount                         $ 9,500,000        
Long-term debt value, carrying value             $ 3,140,000 0                  
Stated interest rate             8.75%           8.75%        
Long-term debt, gross             $ 3,258,000                    
Variable rate construction loan payable, due June 2017 | Term Loan                                  
Line of Credit Facility [Line Items]                                  
Original principal amount                       $ 35,000,000          
Long-term debt value, carrying value             $ 7,008,000 0                  
Effective interest rate             6.00%                    
Revolving Credit Facility                                  
Line of Credit Facility [Line Items]                                  
Line of credit facility, number of banks | bank     2                            
Additional borrowing capacity (up to)     $ 25,000,000                            
Current borrowing capacity     $ 60,000,000                            
Amount outstanding             $ 15,033,000 11,300,000                  
Commitment fee percentage     0.375%                            
Debt interest rate             4.25%                    
Periodic principal payment     $ 1,500,000                            
Maximum amount of Company's consolidated stockholders' equity eligible for investment in or loan to non-core subsidiaries     0.49                            
Minimum debt service coverage ratio     1.5                            
Revolving Credit Facility | As of the end of each fiscal quarter ending on or before June 30, 2016 [Member]                                  
Line of Credit Facility [Line Items]                                  
Maximum EBITDA requirement     2                            
Revolving Credit Facility | As of the end of each fiscal quarter ending September 30, 2016, December 31, 2016, March 31, 2017 and June 30, 2017 [Member]                                  
Line of Credit Facility [Line Items]                                  
Maximum EBITDA requirement     2.75                            
Revolving Credit Facility | As of the end of each fiscal quarter ending September 30, 2017 and thereafter [Member]                                  
Line of Credit Facility [Line Items]                                  
Maximum EBITDA requirement     2                            
Revolving Credit Facility | Federal Funds Effective Rate                                  
Line of Credit Facility [Line Items]                                  
Basis spread on variable rate     0.50%                            
Revolving Credit Facility | London Interbank Offered Rate (LIBOR)                                  
Line of Credit Facility [Line Items]                                  
Basis spread on variable rate     1.50%                            
Revolving Credit Facility | Minimum | Base Rate                                  
Line of Credit Facility [Line Items]                                  
Basis spread on variable rate     0.50%                            
Revolving Credit Facility | Minimum | London Interbank Offered Rate (LIBOR)                                  
Line of Credit Facility [Line Items]                                  
Basis spread on variable rate     2.00%                            
Revolving Credit Facility | Maximum                                  
Line of Credit Facility [Line Items]                                  
Current borrowing capacity     $ 20,000,000                            
Revolving Credit Facility | Maximum | Base Rate                                  
Line of Credit Facility [Line Items]                                  
Basis spread on variable rate     0.25%                            
Revolving Credit Facility | Maximum | London Interbank Offered Rate (LIBOR)                                  
Line of Credit Facility [Line Items]                                  
Basis spread on variable rate     1.75%                            
Term Loan                                  
Line of Credit Facility [Line Items]                                  
Additional borrowing capacity (up to)                     $ 20,000,000            
Current borrowing capacity                     $ 30,000,000            
Term Loan | Notes payable to banks                                  
Line of Credit Facility [Line Items]                                  
Original principal amount     $ 30,000,000                            
Long-term debt value, carrying value             $ 28,500,000 $ 14,285,000                  
Debt interest rate             2.94%