Long-Term Debt (Credit Facility) (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Mar. 17, 2021
Line of Credit Facility [Line Items]
Minimum secured borrowing capacity	$ 11,000,000.0
Minimum fixed charge coverage ratio	110.00%
Payments of financing costs		$ 539,000
Net deferred financing fees	$ 1,408,000		$ 1,465,000
Amortization of deferred financing costs	$ 100,000
Amended and Restated Prior Credit Agreement [Member] | PNC Bank [Member]
Line of Credit Facility [Line Items]
Debt instrument, expiration date	Mar. 17, 2026
Revolving Credit Facility [Member] | PNC Bank [Member]
Line of Credit Facility [Line Items]
Commitment fee on the daily unused portion of the Revolver	0.25%
Net deferred financing fees	$ 800,000
Revolving Credit Facility [Member] | PNC Bank [Member] | LIBOR [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Debt instrument, effective interest rate	2.79%
Revolving Credit Facility [Member] | PNC Bank [Member] | LIBOR [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Debt instrument, effective interest rate	2.96%
Revolving Credit Facility [Member] | Amended and Restated Prior Credit Agreement [Member] | PNC Bank [Member]
Line of Credit Facility [Line Items]
Maximum secured borrowing capacity				$ 105,000,000.0
Term Loan [Member] | PNC Bank [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Frequency of Periodic Payment	quarterly
Quarterly term loan payments	$ 500,000
Term Loan [Member] | PNC Bank [Member] | LIBOR [Member]
Line of Credit Facility [Line Items]
Debt instrument, effective interest rate	3.24%
Term Loan [Member] | Amended and Restated Prior Credit Agreement [Member] | PNC Bank [Member]
Line of Credit Facility [Line Items]
Maximum secured borrowing capacity				$ 15,000,000.0