Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Condensed Consolidated Statements of Comprehensive Income [Abstract]
Net income	$ 22,037	$ 4,810
Securities available for sale
Unrealized losses arising during period	(5,781)	(598)
Change in unrealized gains and losses for which a portion of other than temporary impairment has been recognized in earnings	0	(169)
Reclassification adjustments for gains included in earnings	(1,416)	(253)
Unrealized losses recognized in other comprehensive loss on securities available for sale	(7,197)	(1,020)
Income tax benefit	(1,511)	(214)
Unrealized losses recognized in other comprehensive loss on securities available for sale, net of tax	(5,686)	(806)
Derivative instruments
Unrealized loss arising during period	0	(406)
Reclassification adjustment for expense recognized in earnings	0	75
Unrealized losses recognized in other comprehensive loss on derivative instruments	0	(331)
Income tax benefit	0	(69)
Unrealized losses recognized in other comprehensive loss on derivative instruments, net of tax	0	(262)
Other comprehensive loss	(5,686)	(1,068)
Comprehensive income	$ 16,351	$ 3,742