CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
OPERATING ACTIVITIES:
Net Income (Loss) Attributable to Parent	$ 141,000	$ 140,998
Adjustments to reconcile net income to net cash provided from operating activities:
Depreciation	13,314	12,594
Deferred income and expense, net of amortization	(2,490)	(3,743)
Capitalized loan servicing rights, net of amortization	1,520	479
Amortization of core deposit intangibles	2,898	4,064
Loss (gain) on sale of securities, net	14,436	(473)
Net change in valuation of financial instruments carried at fair value	4,357	(650)
Gain on sale of branches, including related deposits	0	(7,804)
Decrease in deferred taxes	(877)	(9,233)
(Decrease) increase in current taxes receivable, net	(3,370)	9,706
Stock-based compensation	6,785	6,592
Net change in cash surrender value of BOLI	(6,357)	(4,980)
Gain on sale of loans, excluding capitalized servicing rights	(2,277)	(3,246)
Gain on disposal of real estate held for sale and property and equipment, net	(442)	239
Provision for Loan, Lease, and Other Losses	8,267	3,660
Extinguishment of Debt, Amount	0	(765)
Origination of loans held for sale	(187,077)	(376,654)
Proceeds from sales of loans held for sale	200,525	375,656
Net change in:
Other assets	(21,602)	(55,631)
Other liabilities	19,188	46,562
Net cash provided from operating activities	189,552	157,367
INVESTING ACTIVITIES:
Purchases of securities—available-for-sale	54,192	606,622
Principal repayments and maturities of securities—available-for-sale	138,402	296,272
Proceeds from sales of securities—available-for-sale	334,937	25,030
Purchases of securities—held-to-maturity	0	(190,645)
Principal repayments and maturities of securities—held-to-maturity	35,329	40,810
Loan originations, net of repayments	(479,482)	(621,444)
Purchases of loans and participating interest in loans	0	(103,268)
Proceeds from sales of other loans	11,519	13,269
Payments for Disposition of Investments	0	(168,137)
Purchases of property and equipment	(11,626)	(12,244)
Proceeds from sale of real estate held for sale and sale of other property	1,019	5,940
Proceeds from FHLB stock repurchase program	119,840	2,000
Purchase of FHLB stock	123,440	0
Proceeds from maturity of securities purchased under agreements to resell	300,000	0
Investment in bank-owned life insurance	(66)	(50,052)
Other	419	3,544
Net cash provided from (used by) investing activities	272,659	(1,365,547)
FINANCING ACTIVITIES:
(Decrease) increase in deposits, net	(445,507)	85,535
Repayment of long term FHLB advances	0	50,000
Advances of overnight and short term FHLB advances, net	90,000	0
Decrease in other borrowings, net	(44,360)	(30,483)
Repayment of junior subordinated debentures	0	(50,518)
Proceeds from redemption of trust preferred securities related to junior subordinated debentures	0	1,518
Cash dividends paid	(50,263)	(46,019)
Cash paid for repurchase of common stock	0	10,960
Taxes paid related to net share settlement of equity awards	(3,437)	(3,272)
Net Cash Provided by (Used in) Financing Activities, Total	(453,567)	(104,199)
NET CHANGE IN CASH AND CASH EQUIVALENTS	8,644	(1,312,379)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	243,062	2,134,300
CASH AND CASH EQUIVALENTS, END OF PERIOD	251,706	821,921
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Interest paid in cash	66,461	11,332
Tax paid	29,931	10,670
NON-CASH INVESTING AND FINANCING TRANSACTIONS:
Dividends Payable	921	972
Loans, held-for-sale, transferred (from) to portfolio	(8,472)	(13,420)
Securities, available-for-sale, transferred to held-to-maturity	0	462,159
Fair Value of Assets Acquired	0	(1,539)
Liabilities Assumed	0	(178,209)
Transfer of loans to real estate owned and other repossessed assets	$ 205	$ 0