Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	$ 160,709	$ 138,488
Other comprehensive income before reclassification	(1,135)	(62)
Less amounts reclassified from accumulated other comprehensive loss	(149)	(12)
Total other comprehensive income, net	(986)	(50)
Ending Balance	164,305	143,717
Reclassification to unappropriated retained earnings	74,939		$ 70,442
Net unrealized gains on securities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	316	(721)
Other comprehensive income before reclassification	(131)	240
Less amounts reclassified from accumulated other comprehensive loss	(134)	79
Total other comprehensive income, net	3	161
Ending Balance	319	(560)
Adjustments related to defined benefit plan
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(295)	(431)
Other comprehensive income before reclassification	0	0
Less amounts reclassified from accumulated other comprehensive loss	(15)	(91)
Total other comprehensive income, net	15	91
Ending Balance	(280)	(340)
Net unrealized (losses) gains from cash flow hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	168	1,030
Other comprehensive income before reclassification	(1,004)	(302)
Less amounts reclassified from accumulated other comprehensive loss	0	0
Total other comprehensive income, net	(1,004)	(302)
Ending Balance	(836)	728
Accumulated other comprehensive (loss) income
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	154	(157)
Total other comprehensive income, net	(986)	(50)
Ending Balance	(832)	(207)
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	35
Accounting Standards Update 2016-01 And 2018-02 | Accumulated other comprehensive (loss) income
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	189	(122)
Ending Balance	$ (797)	$ (172)