CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net income	$ 60,582	$ 57,408	$ 43,120
Other comprehensive income (loss):
Unrealized holding gains (losses) arising during the period before tax	10,657	8,761	(4,464)
Less reclassification adjustment for gains (losses) included in net income before tax	2,484	(30)
Unrealized gains (losses) on securities available for sale	8,173	8,791	(3,609)
Unrealized holding losses arising during the period before tax	(6,854)	(3,806)	(1,199)
Unrealized gains (losses) on derivatives	(4,862)	(3,806)	(597)
Unrealized holding gains (losses) arising during the period before tax on securities held for sale		587
Less realized holding gains on securities sold		(61)
Unrealized holding losses arising during the period before tax on derivatives held for sale		(446)
Less reclassification adjustment for caplet ineffectiveness before tax		422
Less realized holding losses on derivatives sold		392
Unrealized gains (losses) on assets held for sale		894
Other comprehensive income (loss), before tax	3,311	5,879	(4,206)
Tax expense (credit)	837	1,433	(1,000)
Other comprehensive income (loss), net of tax	2,474	4,446	(3,206)
Comprehensive income	63,056	$ 61,854	39,914
Unhedging Caplet
Other comprehensive income (loss):
Less reclassification adjustment for unhedging caplet	(649)
Swap
Other comprehensive income (loss):
Less reclassification adjustment for unhedging caplet	(792)
Caplet Amortization
Other comprehensive income (loss):
Less reclassification adjustment for unhedging caplet	$ (551)
Caplet Ineffectiveness
Other comprehensive income (loss):
Less reclassification adjustment for unhedging caplet			(602)
ASU 2016-01
Other comprehensive income (loss):
Less reclassification adjustment for adoption of ASU 2016-01			$ 855