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	$ 22,904	$ 14,317	$ 31,894	$ 41,835
Unrealized gains (losses) on securities:
Unrealized holding gains (losses) arising during the period	2,443	(40)	8,589	3,361
Tax effect	(637)	9	(2,144)	(777)
Unrealized holding gains (losses) arising during the period, net of taxes	1,806	(31)	6,445	2,584
Reclassification of amount realized through sale or call of securities	(3,109)	(19)	(3,210)	(22)
Tax effect	761	4	805	5
Reclassification of amount realized through sale or call of securities, net of taxes	(2,348)	(15)	(2,405)	(17)
Change in unrealized gains (losses) on securities, net of tax	(542)	(46)	4,040	2,567
Unrealized gains (losses) on derivative financial instruments:
Unrealized holding gains (losses) arising during the period	357	0	32	0
Tax effect	(88)		(9)
Unrealized holding gains (losses) arising during the period, net of taxes	269	0	23	0
Reclassification of amount of gains (losses) recognized into income	(16)	0	(16)	0
Tax effect	4	0	4	0
Reclassification of amount of gains (losses) recognized into income, net of taxes	(12)	0	(12)	0
Change in unrealized gains (losses) on derivative financial instruments	257	0	11	0
Total other comprehensive income (loss)	(285)	(46)	4,051	2,567
Comprehensive income	$ 22,619	$ 14,271	$ 35,945	$ 44,402