Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ 93,932	$ 84,426
Other comprehensive loss before reclassifications	0	(2,578)
Amounts reclassified from accumulated other comprehensive income (loss)	(81)	42
Income tax benefit	17	555
Ending Balance	97,595	90,722
Derivative Hedging Activities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	0	(191)
Other comprehensive loss before reclassifications	0	(2,578)
Amounts reclassified from accumulated other comprehensive income (loss)	0	121
Income tax benefit	0	538
Ending Balance	0	(2,110)
Post Retirement Benefit Plan Items
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	1,375	1,561
Other comprehensive loss before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive income (loss)	(81)	(79)
Income tax benefit	17	17
Ending Balance	1,311	1,499
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	1,375	1,370
Ending Balance	$ 1,311	$ (611)