Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 37,411	$ 26,991	$ 12,003
Other comprehensive income (loss):
Unrealized holding gains (losses) on securities available-for-sale	6,979	8,498	(4,167)
Income tax effect	(1,635)	(2,294)	1,125
Reclassification adjustment for (gain) loss recognized in income	(914)	166	(327)
Income tax effect	214	(44)	88
Change in defined benefit pension plan	(1,403)	(1,467)	(22)
Income tax effect	329	396	6
Reclassification adjustment for amortization of net actuarial loss recognized in income	420	271	306
Income tax effect	(98)	(73)	(83)
Reclassification adjustment for carrying value adjustment - investment hedge recognized in income	(473)	44	0
Income tax effect	128	(12)	0
Total other comprehensive income (loss)	3,547	5,485	(3,074)
Comprehensive income	$ 40,958	$ 32,476	$ 8,929