Accumulated Other Comprehensive (Loss) Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
AOCI rollforward
Balance	$ (23,223)	$ (18,746)
Change during the period:
Before-tax amount	1,730	(3,409)
Tax (expense) benefit	(475)	970
Adoption of accounting standard		(2,732)
Pension settlement loss	3,518
Reclassification adjustment, net of taxes:
Amortization of net loss	744	694
Total activity for the period	5,517	(4,477)
Balance	(17,706)	(23,223)
Pension Adjustment
AOCI rollforward
Balance	(20,908)	(15,878)
Change during the period:
Before-tax amount	1,940	(3,962)
Tax (expense) benefit	(475)	970
Adoption of accounting standard		(2,732)
Pension settlement loss	3,518
Reclassification adjustment, net of taxes:
Amortization of net loss	744	694
Total activity for the period	5,727	(5,030)
Balance	(15,181)	(20,908)
Foreign Currency Translation
AOCI rollforward
Balance	(2,315)	(2,868)
Change during the period:
Before-tax amount	(210)	553
Reclassification adjustment, net of taxes:
Total activity for the period	(210)	553
Balance	$ (2,525)	$ (2,315)