Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Cash flows from operating activities:
Net income	$ 136,432	$ 149,530
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation	3,906	3,818
Provision for credit losses	14,674	18,552
Deferred income taxes	1,975	(103)
Net amortization of discount/premiums on debt securities	3,109	2,996
Net amortization on loan discount/premiums	1,386	3,819
Amortization of intangible assets	2,918	3,493
Amortization of servicing assets	881	1,307
Mortgage loans originated-for-sale	(18,292)	(14,560)
Proceeds from mortgage loans sold	18,451	15,648
Sale of investment securities	0	(381)
Sale of SBA loans	(1,415)	(2,015)
Sale of other real estate	(3,157)	(187)
Sale of fixed assets	0	(10)
Sale of state tax credits	(768)	(215)
Share-based compensation	7,578	7,809
Net change in other assets and liabilities	27,745	(269)
Net cash provided by operating activities	195,423	189,252
Cash flows from investing activities:
Net increase in loans	(238,646)	(943,905)
Sale of debt securities, available-for-sale	0	28,741
Paydown or maturity of debt securities, available-for-sale	185,167	171,923
Paydown or maturity of debt securities, held-to-maturity	4,583	5,086
Redemption of other investments	55,791	88,863
Sale of SBA loans	25,090	44,975
Sale of state tax credits held for sale	4,317	1,225
Sale of other real estate	11,017	457
Sale of fixed assets	0	83
Payments for the purchase of:
Available-for-sale debt securities	(325,665)	(198,962)
Held-to-maturity debt securities	(110,172)	(30,893)
Other investments	(66,841)	(84,023)
State tax credits held for sale	(2,810)	(75)
Fixed assets	(5,594)	(2,193)
Net cash used in investing activities	(463,763)	(918,698)
Cash flows from financing activities:
Net decrease in noninterest-bearing deposit accounts	(24,498)	(790,246)
Net increase in interest-bearing deposit accounts	313,449	1,871,003
Net increase (decrease) in FHLB advances	150,000	(100,000)
Repayments of notes payable	(11,429)	(4,286)
Net decrease in other borrowings	(115,586)	(137,461)
Repurchase of common stock	(18,385)	0
Cash dividends paid on common stock	(29,171)	(28,014)
Cash dividends paid on preferred stock	(2,813)	(2,813)
Other	124	602
Net cash provided by financing activities	261,691	808,785
Net increase (decrease) in cash and cash equivalents	(6,649)	79,339
Cash and cash equivalents, beginning of period	433,029	291,359
Cash and cash equivalents, end of period	426,380	370,698
Cash paid during the period for:
Interest	214,819	129,205
Income taxes	27,192	34,013
Noncash investing and financing transactions:
Transfer to other bank owned assets	6,659	6,933
Right-of-use assets obtained in exchange for lease obligations	1,387	6,001
Transfer to securities available-for-sale in settlement of loans	$ 10,448	$ 0