Long-Term Debt and Related Matters - Narrative (Details)	Aug. 13, 2021 USD ($)	Dec. 31, 2021 USD ($) covenant	Dec. 31, 2020 USD ($)	Jun. 26, 2020 USD ($)
Line of Credit Facility
Line of credit facility, amount outstanding		$ 31,100,000	$ 44,777,000
PNC Bank N.A. Citizens Bank N.A. Wells Fargo Bank National Association Bank of America N.A. And BMO Harris Bank National Association | Fourth Amended And Restated Credit Agreement
Line of Credit Facility
Minimum fixed charge coverage ratio	1.05
PNC Bank N.A. Citizens Bank N.A. Wells Fargo Bank National Association Bank of America N.A. And BMO Harris Bank National Association | Fourth Amended And Restated Credit Agreement | Debt Instrument, Redemption, Period One
Line of Credit Facility
Number of financial covenants | covenant		2
Maximum leverage ratio	3.25
PNC Bank N.A. Citizens Bank N.A. Wells Fargo Bank National Association Bank of America N.A. And BMO Harris Bank National Association | Fourth Amended And Restated Credit Agreement | Debt Instrument, Redemption, Period Two
Line of Credit Facility
Maximum leverage ratio	3.50
PNC Bank N.A. Citizens Bank N.A. Wells Fargo Bank National Association Bank of America N.A. And BMO Harris Bank National Association | Overnight Bank Funding Rate | Fourth Amended And Restated Credit Agreement
Line of Credit Facility
Debt instrument, basis spread on variable rate	0.50%
PNC Bank N.A. Citizens Bank N.A. Wells Fargo Bank National Association Bank of America N.A. And BMO Harris Bank National Association | London Interbank Offered Rate (LIBOR) | Fourth Amended And Restated Credit Agreement
Line of Credit Facility
Debt instrument, basis spread on variable rate	1.00%
PNC Bank N.A. Citizens Bank N.A. Wells Fargo Bank National Association Bank of America N.A. And BMO Harris Bank National Association | London Interbank Offered Rate (LIBOR) | Minimum | Fourth Amended And Restated Credit Agreement
Line of Credit Facility
Debt instrument, basis spread on variable rate	1.25%
PNC Bank N.A. Citizens Bank N.A. Wells Fargo Bank National Association Bank of America N.A. And BMO Harris Bank National Association | London Interbank Offered Rate (LIBOR) | Maximum | Fourth Amended And Restated Credit Agreement
Line of Credit Facility
Debt instrument, basis spread on variable rate	2.25%
PNC Bank N.A. Citizens Bank N.A. Wells Fargo Bank National Association Bank of America N.A. And BMO Harris Bank National Association | Base Rate | Minimum | Fourth Amended And Restated Credit Agreement
Line of Credit Facility
Debt instrument, basis spread on variable rate	0.25%
PNC Bank N.A. Citizens Bank N.A. Wells Fargo Bank National Association Bank of America N.A. And BMO Harris Bank National Association | Base Rate | Maximum | Fourth Amended And Restated Credit Agreement
Line of Credit Facility
Debt instrument, basis spread on variable rate	1.25%
PNC Bank N.A. Citizens Bank N.A. Wells Fargo Bank National Association Bank of America N.A. And BMO Harris Bank National Association | Revolving Credit Facility
Line of Credit Facility
Liquidity covenant	$ 15,000,000
PNC Bank N.A. Citizens Bank N.A. Wells Fargo Bank National Association Bank of America N.A. And BMO Harris Bank National Association | Revolving Credit Facility | Debt Instrument, Redemption, Period One
Line of Credit Facility
Acquisition consideration threshold	$ 50,000,000
Acquisition consideration threshold percent	275.00%
PNC Bank N.A. Citizens Bank N.A. Wells Fargo Bank National Association Bank of America N.A. And BMO Harris Bank National Association | Revolving Credit Facility | Debt Instrument, Redemption, Period Two
Line of Credit Facility
Acquisition consideration threshold	$ 75,000,000
Acquisition consideration threshold percent	175000.00%
PNC Bank N.A. Citizens Bank N.A. Wells Fargo Bank National Association Bank of America N.A. And BMO Harris Bank National Association | Revolving Credit Facility | Fourth Amended And Restated Credit Agreement
Line of Credit Facility
Debt instrument, term	5 years
Line of credit facility, maximum borrowing capacity	$ 130,000,000
Line of credit, accordion feature, lower borrowing capacity	25,000,000
Line of credit facility, maximum increase in commitments	50,000,000
PNC Bank N.A. Citizens Bank N.A. Wells Fargo Bank National Association Bank of America N.A. And BMO Harris Bank National Association | Revolving Credit Facility | Prior Credit Facility
Line of Credit Facility
Line of credit facility, increase (decrease)	$ 15,000,000
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company | Revolving Credit Facility
Line of Credit Facility
Line of credit facility, amount outstanding		$ 544,000	949,000
Line of credit facility, current borrowing capacity		$ 98,356,000	69,274,000
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company | Revolving Credit Facility | First Amendment
Line of Credit Facility
Line of credit, accordion feature, lower borrowing capacity			$ 5,000,000	$ 25,000,000
Line of credit facility, accordion feature, decrease limit				$ 120,000,000