CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement Of Other Comprehensive Income [Abstract]
Net income	$ 2,966	$ 12,597
Securities available-for-sale
Unrealized holding gains arising during the period	16,665	8,635
Reclassification adjustments for net gains included in net income	(1,375)
Tax effect	(4,258)	(2,296)
Net of tax	11,032	6,339
Cash flow hedges
Unrealized holding losses arising during the period		(1,817)
Reclassification adjustments for net losses (gains) included in net income	21	(705)
Tax effect	(5)	702
Net of tax	16	(1,820)
Total other comprehensive income	11,048	4,519
Comprehensive income	$ 14,014	$ 17,116