CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 13,739	$ 13,504	$ 24,967	$ 26,422
Other comprehensive income (loss):
Unrealized holding gains arising during the period before tax	5,336	4,669	7,817	8,813
Less reclassification adjustment for gains (losses) included in net income before tax	65	(52)	65	(52)
Unrealized gains on securities available for sale	5,271	4,721	7,752	8,865
Unrealized holding losses arising during the period before tax	(654)	(1,780)	(7,815)	(2,942)
Less reclassification adjustment for caplet amortization before tax	(124)	(134)	(234)	(291)
Unrealized losses on derivatives	(530)	(1,646)	(7,581)	(2,651)
Other comprehensive income (loss), before tax	4,741	3,075	171	6,214
Tax expense	1,119	833	240	1,628
Other comprehensive income (loss), net of tax	3,622	2,242	(69)	4,586
Comprehensive income	$ 17,361	$ 15,746	$ 24,898	$ 31,008