Annual report pursuant to Section 13 and 15(d)

Long-Term Debt and Notes Payable - Summary of Long-Term Debt (Details)

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Long-Term Debt and Notes Payable - Summary of Long-Term Debt (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Debt Instrument    
Capital Lease Obligations   $ 6,644
Total Debt $ 188,224 233,982
Less Current Maturities 224 1,870
Long-term debt and capital lease obligations excluding current maturities 188,000 232,112
Long-term Debt and Lease Obligation, Current $ 224 1,870
Line of Credit | Revolving Credit Facility | LIBOR    
Debt Instrument    
Effective interest rate 2.75%  
Line of Credit | Revolving Credit Facility | LIBOR | Minimum    
Debt Instrument    
Interest rate on revolving credit at LIBOR rate 1.00%  
Line of Credit | Revolving Credit Facility | LIBOR | Maximum    
Debt Instrument    
Interest rate on revolving credit at LIBOR rate 1.50%  
Line of Credit | Revolving Credit Facility | Fifth Amended and Restated Credit Agreement    
Debt Instrument    
Long-term debt $ 188,000 227,000
Other Bank Debt    
Debt Instrument    
Long-term debt $ 224 $ 338