CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 32,697	$ 16,533
Other comprehensive (loss) income:
Unrealized (loss) gain on debt securities (net of tax benefit of $112 in 2021 and net tax expense of $586 in 2020)	(416)	2,149
Accretion of unrealized loss on debt securities reclassified to held-to-maturity (net of tax expense of $73 in 2021 and $84 in 2020)	107	115
Reclassification adjustment for gains included in net income (net of tax benefit of $173 in 2020)	0	(547)
Total other comprehensive (loss) income	(309)	1,717
Total comprehensive income	32,388	18,250
Less: Dividends on preferred shares	1,004	0
Comprehensive income available to common stockholders	$ 31,384	$ 18,250