CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 32,999	$ 6,030
Unrealized gains and losses:
Unrealized holding (losses) gains on available-for-sale securities arising during the period	(5,440)	6,252
Tax effect	1,432	(1,691)
Net of tax	(4,008)	4,561
Reclassification adjustment for realized gains on securities included in net income		(29)
Tax effect		6
Net of tax		(23)
Unrealized gains (losses) on cash flow hedge	24	(2,749)
Tax effect	(11)	773
Net of tax	13	(1,976)
Reclassification adjustment for realized losses (gains) included in net income	631	(7)
Tax effect	(177)	2
Net of tax	454	(5)
Unrealized pension plan gains and losses:
Reclassification adjustment for realized losses on pension plan included in net income	75	75
Tax effect	(20)	(21)
Net of tax	55	54
Total other comprehensive (loss) income	(3,486)	2,611
Total comprehensive income	$ 29,513	$ 8,641