New Markets Tax Credit Financing Transaction (Narrative) (Details) - USD ($) $ in Thousands		3 Months Ended
	Mar. 09, 2018	Mar. 31, 2022	Dec. 31, 2021
New Markets Tax Credit Financing Transaction [Line Items]
New market tax credits recapture percentage	100.00%
New market tax credits period of recapture	7 years
Other long-term liabilities		$ 3,320	$ 3,360
Gain (Loss) on Sale of Derivatives		2,800
Direct costs incurred in structuring financing transaction		1,408	1,465
New Markets Tax Credit (NMTC) Program [Member]
New Markets Tax Credit Financing Transaction [Line Items]
Aggregate principal amount of leverage loan loaned to investment fund	$ 6,700
Leverage loan, due date	2048-03
Other long-term liabilities		$ 2,800	$ 2,800
Direct costs incurred in structuring financing transaction	$ 700
New Markets Tax Credit (NMTC) Program [Member] | PNC New Markets Investment Partners, LLC [Member]
New Markets Tax Credit Financing Transaction [Line Items]
Capital contributions to investment fund	$ 3,500