Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 181,186	$ 173,911	$ 164,305	$ 160,709	$ 173,911	$ 160,709
Total other comprehensive income (loss), net of tax	337	655	74	(986)	992	(912)
Ending balance	188,756	181,186	166,607	164,305	188,756	166,607
Reclassification to unappropriated retained earnings	105,811				105,811		$ 90,669
Net unrealized (losses) gains on securities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(153)	(214)	284	281	(214)	281
Other comprehensive income (loss) before reclassifications	119		362		425	231
Less amounts reclassified from accumulated other comprehensive income (loss)	18		62		263	(72)
Total other comprehensive income (loss), net of tax	101		300		162	303
Ending balance	(52)	(153)	584	284	(52)	584
Adjustments related to defined benefit plan
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(223)	(238)	(280)	(295)	(238)	(295)
Less amounts reclassified from accumulated other comprehensive income (loss)	(223)		(15)		(238)	(30)
Total other comprehensive income (loss), net of tax	223		15		238	30
Ending balance		(223)	(265)	(280)		(265)
Net unrealized (losses) gains from cash flow hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(158)	(737)	(836)	168	(737)	168
Other comprehensive income (loss) before reclassifications	13		(241)		592	(1,245)
Total other comprehensive income (loss), net of tax	13		(241)		592	(1,245)
Ending balance	(145)	(158)	(1,077)	(836)	(145)	(1,077)
Accumulated other comprehensive (loss) income
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(534)	(1,189)	(832)	154	(1,189)	154
Other comprehensive income (loss) before reclassifications	132		121		1,017	(1,014)
Less amounts reclassified from accumulated other comprehensive income (loss)	(205)		47		25	(102)
Total other comprehensive income (loss), net of tax	337	655	74	(986)	992	(912)
Ending balance	$ (197)	$ (534)	$ (758)	$ (832)	$ (197)	$ (758)