Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 6,491	$ 4,327	$ 25,573	$ 22,896
Other comprehensive income:
Unrealized holding gains on securities available-for-sale	1,226	1,362	3,191	7,913
Income tax effect	(331)	(368)	(862)	(2,137)
Reclassification adjustment for (gain) loss recognized in income	(35)	11	(865)	179
Income tax effect	9	(2)	234	(48)
Change in defined benefit pension plan	(102)	(897)	(1,809)	(1,744)
Income tax effect	28	242	489	470
Reclassification adjustment for amortization of net actuarial loss recognized in income	105	68	315	204
Income tax effect	(28)	(18)	(85)	(55)
Reclassification adjustment for carrying value adjustment - investment hedge recognized in income	95	(36)	(738)	(162)
Income tax effect	(26)	10	199	44
Total other comprehensive income	941	372	69	4,664
Comprehensive income	$ 7,432	$ 4,699	$ 25,642	$ 27,560

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