Quarterly report pursuant to Section 13 or 15(d)

Debt - Summary of Long-term Debt (Details)

v3.19.1
Debt - Summary of Long-term Debt (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Jan. 01, 2019
Dec. 31, 2018
Debt Instrument [Line Items]      
Financing leases $ 33,337 $ 33,363 $ 33,363
Debt and financing leases, gross 259,922   253,873
Less - current maturities 55,731   26,890
Less - deferred financing fees 7,177   7,821
Long-term debt and financing lease liabilities, less current portions and net of deferred financing fees (including amounts in VIEs of $26,104 and $26,461, respectively) 197,014   219,162
Future interest payments $ 25,321    
Term Loan | Variable rate term loan payable in semi-annual installments      
Debt Instrument [Line Items]      
Weighted average interest rate, percentage 4.85%    
Long-term debt, gross $ 936   936
Term Loan | Variable rate term loan payable in semi-annual installments      
Debt Instrument [Line Items]      
Weighted average interest rate, percentage 4.60%    
Long-term debt, gross $ 7,426   7,426
Term Loan | Term loan payable in quarterly installments      
Debt Instrument [Line Items]      
Fixed interest rate, percentage 7.25%    
Long-term debt, gross $ 1,464   1,464
Term Loan | Term loan payable in monthly installments      
Debt Instrument [Line Items]      
Fixed interest rate, percentage 6.11%    
Long-term debt, gross $ 3,886   3,843
Term Loan | Variable rate term loan payable in quarterly installments      
Debt Instrument [Line Items]      
Weighted average interest rate, percentage 6.10%    
Long-term debt, gross $ 30,180   30,674
Term Loan | Variable rate term loan payable in quarterly installments      
Debt Instrument [Line Items]      
Weighted average interest rate, percentage 5.10%    
Long-term debt, gross $ 17,227   17,208
Term Loan | Term loan payable in quarterly installments      
Debt Instrument [Line Items]      
Fixed interest rate, percentage 4.95%    
Long-term debt, gross $ 3,939   3,925
Term Loan | Term loan payable in quarterly installments      
Debt Instrument [Line Items]      
Fixed interest rate, percentage 5.00%    
Long-term debt, gross $ 3,839   3,945
Term Loan | Term loan payable in monthly installments      
Debt Instrument [Line Items]      
Weighted average interest rate, percentage 4.50%    
Long-term debt, gross $ 22,081   22,081
Term Loan | Term loan payable in quarterly installments      
Debt Instrument [Line Items]      
Fixed interest rate, percentage 5.61%    
Long-term debt, gross $ 2,791   2,735
Construction loan, unused borrowing capacity $ 2,742    
Term Loan | Variable rate term loan payable in quarterly installments      
Debt Instrument [Line Items]      
Fixed interest rate, percentage 5.05%    
Long-term debt, gross $ 12,917   12,915
Term Loan | Variable rate term loan payable in quarterly installments      
Debt Instrument [Line Items]      
Weighted average interest rate, percentage 10.10%    
Long-term debt, gross $ 18,042   21,475
Term Loan | Term loan payable in quarterly installments      
Debt Instrument [Line Items]      
Weighted average interest rate, percentage 5.15%    
Long-term debt, gross $ 30,138   30,069
Term Loan | Variable rate term loan payable in semi-annual installments      
Debt Instrument [Line Items]      
Weighted average interest rate, percentage 4.65%    
Long-term debt, gross $ 9,670   9,668
Term Loan | Variable rate term loan payable in monthly/quarterly installments      
Debt Instrument [Line Items]      
Weighted average interest rate, percentage 4.995%    
Long-term debt, gross $ 9,077   9,072
Revolving Senior Secured Credit Facility      
Debt Instrument [Line Items]      
Weighted average interest rate, percentage 4.85%    
Long-term debt, gross $ 52,972   $ 43,074