Annual report pursuant to Section 13 and 15(d)

Long-Term Debt - Additional Information (Details)

v3.3.1.900
Long-Term Debt - Additional Information (Details)
 1 Months Ended 12 Months Ended 13 Months Ended
Jun. 30, 2015
USD ($)
bank
Mar. 31, 2010
USD ($)
Sep. 30, 2015
USD ($)
Oct. 31, 2012
USD ($)
bank
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Mar. 31, 2010
USD ($)
Mar. 12, 2014
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         $ 119,220,000 $ 102,292,000              
Payments on long-term debt         12,392,000 18,392,000 $ 14,669,000            
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         $ 11,644,000 13,638,000              
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         3.857%                
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%
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         2.607%                
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                
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                
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         $ 9,822,000 10,468,000              
Effective interest rate         2.232%                
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         $ 291,000                
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         11,549,000 12,436,000              
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         234,000 350,000              
Principal payments due in quarterly installments         $ 11,000                
Stated interest rate         6.50%                
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         $ 3,208,000 3,746,000              
Stated interest rate                     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         136,000                
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         4,772,000 6,081,000              
Stated interest rate                   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         67,000                
Variable rate construction to term loan payable in quarterly installments through June 2028 | Term Loan                          
Line of Credit Facility [Line Items]                          
Original principal amount       $ 47,234,000                  
Long-term debt value, carrying value         $ 38,401,000 41,041,000              
Effective interest rate         3.607%                
Debt instrument, number of banks | bank       2                  
Variable rate construction to term loan payable in quarterly installments through June 2028 | 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 2028 | Term Loan | Maximum                          
Line of Credit Facility [Line Items]                          
Principal payments due in quarterly installments         $ 903,000                
2.818% variable rate construction term loan due 2023 | Term Loan                          
Line of Credit Facility [Line Items]                          
Effective interest rate         2.838%                
Debt instrument, term     7 years                    
2.818% variable rate construction term loan due 2023 | Variable rate construction to term loan                          
Line of Credit Facility [Line Items]                          
Original principal amount     $ 20,746,000                    
Long-term debt value, carrying value         $ 17,112,000                
Revolving Credit Facility                          
Line of Credit Facility [Line Items]                          
Line of credit facility, number of banks | bank 2                        
Current borrowing capacity $ 60,000,000                        
Additional borrowing capacity (up to) $ 25,000,000                        
Amount outstanding         $ 11,300,000 5,000              
Increase (decrease) in basis spread on prime rate                 0.25%        
Increase (decrease) in basis spread on variable rate                 0.25%        
Commitment fee percentage 0.375%                        
Debt interest rate         3.75%                
Periodic principal payment $ 1,429,000                        
Maximum amount of Company's consolidated stockholders' equity eligible for investment in or loan to non-core subsidiaries 0.49                        
Maximum EBITDA requirement 2                        
Minimum debt service coverage ratio 1.5                        
Revolving Credit Facility | Canadian dollars, Euros and Pounds Sterling | Maximum                          
Line of Credit Facility [Line Items]                          
Current borrowing capacity $ 20,000,000                        
Revolving Credit Facility | London Interbank Offered Rate (LIBOR)                          
Line of Credit Facility [Line Items]                          
Basis spread on variable rate 1.50%                        
Revolving Credit Facility | London Interbank Offered Rate (LIBOR) | Minimum                          
Line of Credit Facility [Line Items]                          
Basis spread on variable rate 2.00%                        
Revolving Credit Facility | London Interbank Offered Rate (LIBOR) | Maximum                          
Line of Credit Facility [Line Items]                          
Basis spread on variable rate 1.75%                        
Revolving Credit Facility | Base Rate | Minimum                          
Line of Credit Facility [Line Items]                          
Basis spread on variable rate 0.50%                        
Revolving Credit Facility | Base Rate | Maximum                          
Line of Credit Facility [Line Items]                          
Basis spread on variable rate 0.25%                        
Revolving Credit Facility | Federal Funds Effective Rate                          
Line of Credit Facility [Line Items]                          
Basis spread on variable rate 0.50%                        
Term Loan | Notes Payable to Banks                          
Line of Credit Facility [Line Items]                          
Original principal amount $ 17,143,000                        
Long-term debt value, carrying value         $ 14,285,000 $ 20,000,000              
Debt interest rate         2.36%                
Stated interest rate         3.72%