Accumulated Other Comprehensive (Loss) Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
AOCI rollforward
Balance	$ (18,746)	$ (16,702)
Change during the period:
Before-tax amount	(3,409)	(3,348)
Tax (expense) benefit	970	665
Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Tax Effect	(2,732)
Reclassification adjustment, net of taxes:
Amortization of net loss	694	639
Total activity in period	(4,477)	(2,044)
Balance	(23,223)	(18,746)
Pension Adjustment
AOCI rollforward
Balance	(15,878)	(14,470)
Change during the period:
Before-tax amount	(3,962)	(2,712)
Tax (expense) benefit	970	665
Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Tax Effect	(2,732)
Reclassification adjustment, net of taxes:
Amortization of net loss	694	639
Total activity in period	(5,030)	(1,408)
Balance	(20,908)	(15,878)
Unrealized Gain (Loss) On Securities
AOCI rollforward
Balance		15
Change during the period:
Before-tax amount		(15)
Reclassification adjustment, net of taxes:
Total activity in period		(15)
Foreign Currency Translation
AOCI rollforward
Balance	(2,868)	(2,247)
Change during the period:
Before-tax amount	553	(621)
Reclassification adjustment, net of taxes:
Total activity in period	553	(621)
Balance	$ (2,315)	$ (2,868)