Consolidated Statements of Comprehensive Income - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net income	$ 44,138,000	$ 49,456,000	$ 42,024,000
Other comprehensive income (loss):
Unrealized holding gains (losses) on securities available for sale	2,268,000	15,106,000	(4,225,000)
Fair value of interest rate swap	0	0	2,000
Total other comprehensive income (loss)	2,268,000	15,106,000	(4,223,000)
Tax effect of unrealized holding gains (losses) on securities available for sale	(477,000)	(3,172,000)	846,000
Tax effect of fair value of interest rate swap	0	0	(1,000)
Total tax effect of other comprehensive income (loss)	(477,000)	(3,172,000)	845,000
Other comprehensive income (loss), net of tax effect	1,791,000	11,934,000	(3,378,000)
Comprehensive income	$ 45,929,000	$ 61,390,000	$ 38,646,000