CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
OPERATING ACTIVITIES:
Net income	$ 91,928,000	$ 101,237,000
Adjustments to reconcile net income to net cash provided from operating activities:
Depreciation	8,304,000	8,709,000
Deferred income/expense, net of amortization	(3,422,000)	(21,100,000)
Capitalized loan servicing rights, net of amortization	(282,000)	(321,000)
Amortization of core deposit intangibles	2,849,000	3,422,000
Gain on sale of securities, net	(467,000)	(562,000)
Net change in valuation of financial instruments carried at fair value	(118,000)	(117,000)
Gain on sale of branches, including related deposits	(7,804,000)	0
Decrease in deferred taxes	(5,469,000)	(5,772,000)
Increase in current taxes payable	11,935,000	365,000
Stock-based compensation	4,417,000	4,651,000
Net change in cash surrender value of BOLI	(3,176,000)	(2,247,000)
Gain on sale of loans, excluding capitalized servicing rights	(4,370,000)	(14,904,000)
Gain on disposal of real estate held for sale and property and equipment, net	(65,000)	(1,765,000)
Recapture of provision for credit losses	(2,427,000)	(19,507,000)
Loss on extinguishment of debt	765,000	0
Origination of loans held for sale	(299,105,000)	(504,319,000)
Proceeds from sales of loans held for sale	314,427,000	691,277,000
Net change in:
Other assets	(22,956,000)	(375,000)
Other liabilities	19,475,000	69,508,000
Net cash provided from operating activities	115,377,000	319,724,000
INVESTING ACTIVITIES:
Purchases of securities—available-for-sale	469,135,000	1,875,578,000
Principal repayments and maturities of securities—available-for-sale	204,222,000	826,609,000
Proceeds from sales of securities—available-for-sale	24,491,000	51,495,000
Purchases of securities—held-to-maturity	(194,897,000)	(52,440,000)
Principal repayments and maturities of securities—held-to-maturity	26,052,000	17,142,000
Purchases of equity securities	0	(4,750,000)
Proceeds from sales of equity securities	0	4,796,000
Loan (originations) repayments, net	(279,298,000)	209,844,000
Purchases of loans and participating interest in loans	(75,919,000)	(33,000)
Proceeds from sales of other loans	9,962,000	31,297,000
Net cash received (paid) related to branch divestitures	(168,137,000)	0
Purchases of property and equipment	(7,414,000)	(5,198,000)
Proceeds from sale of real estate held for sale and sale of other property	5,870,000	7,255,000
Proceeds from FHLB stock repurchase program	2,000,000	2,358,000
Purchase of securities purchased under agreements to resell	0	(300,000,000)
Investment in bank-owned life insurance	(50,043,000)	(47,000)
Other	3,601,000	1,381,000
Net cash used by investing activities	(968,645,000)	(1,085,869,000)
FINANCING ACTIVITIES:
Increase in deposits, net	63,833,000	1,069,412,000
Repayment of long term FHLB advances	50,000,000	50,000,000
(Decrease) increase in other borrowings, net	(29,752,000)	52,950,000
Repayment of junior subordinated debentures	(50,518,000)	0
Proceeds from redemption of trust securities related to junior subordinated debentures	1,518,000	0
Cash dividends paid	(30,967,000)	(29,393,000)
Cash paid for repurchase of common stock	10,960,000	39,879,000
Taxes paid related to net share settlement of equity awards	3,339,000	3,197,000
Net Cash Provided by (Used in) Financing Activities, Total	(110,185,000)	999,893,000
NET CHANGE IN CASH AND CASH EQUIVALENTS	(963,453,000)	233,748,000
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	2,134,300,000	1,234,183,000
CASH AND CASH EQUIVALENTS, END OF PERIOD	1,170,847,000	1,467,931,000
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Interest paid in cash	8,704,000	13,339,000
Tax paid (refunds received)	1,540,000	(15,975,000)
NON-CASH INVESTING AND FINANCING TRANSACTIONS:
Transfer of loans to real estate owned and other repossessed assets	0	423,000
Dividends Payable	816,000	1,011,000
Fair Value of Assets Acquired	(1,539,000)	0
Liabilities Assumed	$ (178,209,000)	$ 0