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Long-Term Debt (Schedule of Long-Term Debt) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Debt Instrument [Line Items]    
Financing leases   $ 21
Less unamortized issuance costs $ (1,716) (2,452)
Total 194,872 59,892
Less current maturities (971) (728)
Long-term debt 193,901 59,164
Revolving Credit Loan [Member] | Senior Secured Credit Facility [Member]    
Debt Instrument [Line Items]    
Long-term debt gross 178,458 43,458
Term Loan [Member] | Senior Secured Credit Facility [Member]    
Debt Instrument [Line Items]    
Long-term debt gross $ 18,130 $ 18,865