Long-Term Debt (Schedule of Long-Term Debt) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Less unamortized issuance costs	$ (1,411)	$ (1,716)
Total	194,687	194,872
Less current maturities	(973)	(971)
Long-term debt	193,714	193,901
Revolving Credit Loan [Member] \| Senior Secured Credit Facility [Member]
Debt Instrument [Line Items]
Long-term debt gross	178,458	178,458
Term Loan [Member] \| Senior Secured Credit Facility [Member]
Debt Instrument [Line Items]
Long-term debt gross	$ 17,640	$ 18,130

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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