CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net Income (Loss) Attributable to Parent	$ 183,624	$ 195,378	$ 201,048
Unrealized holding gain (loss) on securities—available-for-sale arising during the period	(54,307)	418,827	80,073
Income tax (expense) benefit related to securities—available-for-sale unrealized holding losses	(13,034)	100,518	19,217
Reclassification for net loss (gain) on securities—available-for-sale realized in earnings	19,242	3,248	(498)
Income tax (benefit) expense related to securities—available-for-sale realized in earnings	(4,618)	(780)	120
OCI, Debt Securities, Unrealized Gain (Loss) on Securities Transferred from Available-For-Sale to Held-to-Maturity, Before Tax	0	(34,596)	0
Income tax benefit related to securities transferred from available-for-sale to held-to-maturity	0	8,303	0
OCI, Debt Securities, Available-for-Sale, Transfer to Held-to-Maturity, Adjustment from AOCI for Amortization of Gain (Loss), before Tax	2,338	2,625	0
OCI, Debt Securities, Available-for-Sale, Transfer to Held-to-Maturity, Adjustment from AOCI for Amortization of Gain (Loss), Tax	(561)	(630)	0
Net unrealized gain (loss) on interest rate swaps used in cash flow hedges	12,557	(25,223)	(1,261)
Income tax (expense) benefit related to interest rate swaps used in cash flow hedges	(3,014)	6,054	302
Changes in fair value of junior subordinated debentures related to instrument specific credit risk	8,444	(5,560)	(10,419)
Income tax (expense) benefit related to junior subordinated debentures	(2,027)	1,334	2,501
Reclassification of fair value of junior subordinated debentures redeemed	0	765	1,613
Income tax expense related to junior subordinated debentures redeemed	0	(184)	(387)
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Other Comprehensive Income (Loss), Net of Tax, Total	73,634	(362,953)	(68,885)
COMPREHENSIVE INCOME (LOSS)	$ 257,258	$ (167,575)	$ 132,163