Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 173,911	$ 160,709	$ 138,488
Total other comprehensive income (loss), net of tax	1,511	(1,343)	311
Ending balance	205,729	173,911	160,709
Reclassification to unappropriated retained earnings	123,037	90,669
Net unrealized (losses) gains on securities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(215)	316	(721)
Other comprehensive income (loss) before reclassifications	722	(422)	1,332
Less amounts reclassified from accumulated other comprehensive income (loss)	478	73	295
Total other comprehensive income (loss), net of tax	244	(495)	1,037
Ending balance	29	(215)	316
Adjustments related to defined benefit plan
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(238)	(295)	(431)
Other comprehensive income (loss) before reclassifications	0	0	0
Less amounts reclassified from accumulated other comprehensive income (loss)	(238)	(57)	(136)
Total other comprehensive income (loss), net of tax	238	57	136
Ending balance	0	(238)	(295)
Net unrealized (losses) gains from cash flow hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(736)	169	1,031
Other comprehensive income (loss) before reclassifications	579	(1,224)	(862)
Less amounts reclassified from accumulated other comprehensive income (loss)	(450)	(319)	0
Total other comprehensive income (loss), net of tax	1,029	(905)	(862)
Ending balance	293	(736)	169
Accumulated other comprehensive income (loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(1,189)	154	(157)
Other comprehensive income (loss) before reclassifications	1,301	(1,646)	470
Less amounts reclassified from accumulated other comprehensive income (loss)	(210)	(303)	159
Total other comprehensive income (loss), net of tax	1,511	(1,343)	311
Ending balance	322	(1,189)	154
Accounting Standards Update 2016-01 and 2018-02
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Reclassification to unappropriated retained earnings		36	36
Accounting Standards Update 2016-01 and 2018-02 | Net unrealized (losses) gains on securities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(179)
Ending balance		(179)
Accounting Standards Update 2016-01 and 2018-02 | Accumulated other comprehensive income (loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ (1,153)	190	(121)
Ending balance		$ (1,153)	$ 190