CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net Income (Loss) Attributable to Parent	$ 201,048	$ 115,928	$ 146,278
Unrealized holding (loss) gain on securities—available-for-sale arising during the period	80,073	(45,247)	(33,843)
Income tax benefit (expense) related to securities—available-for-sale unrealized holding losses	19,217	(10,860)	(8,122)
Reclassification for net gain on securities—available-for-sale realized in earnings	(498)	(454)	(34)
Income tax expense related to securities—available-for-sale realized gains	120	109	8
Net unrealized loss on interest rate swaps used in cash flow hedges	(1,261)	0	0
Income tax benefit related interest rate swaps used in cash flow hedges	302	0	0
Changes in fair value of junior subordinated debentures related to instrument specific credit risk	(10,419)	2,330	601
Income tax benefit (expense) related to junior subordinated debentures	2,501	(559)	(144)
Reclassification of fair value of junior subordinated debentures redeemed	1,613	0	0
Income tax expense related to junior subordinated debentures redeemed	(387)	0	0
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Other Comprehensive Income (Loss), Net of Tax, Total	(68,885)	35,813	26,152
COMPREHENSIVE INCOME	$ 132,163	$ 151,741	$ 172,430