CONSOLIDATED STATEMENTS OF CASH FLOWS	9 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)
OPERATING ACTIVITIES:
Net income	$ 76,971,000	$ 112,623,000
Adjustments to reconcile net income to net cash provided from operating activities:
Depreciation	13,677,000	12,934,000
Deferred income and expense, net of amortization	(8,503,000)	(350,000)
Amortization of core deposit intangibles	5,867,000	6,090,000
(Gain) loss on sale of securities	(815,000)	29,000
Net change in valuation of financial instruments carried at fair value	2,360,000	172,000
Dividend Income, Equity Securities, Operating	(255,000)	0
(Increase) decrease in deferred taxes, net	1,279,000	(16,136,000)
Increase in current taxes payable	1,426,000	3,410,000
Stock-based compensation	6,893,000	5,101,000
Net change in cash surrender value of BOLI	(3,721,000)	(3,086,000)
Gain on sale of loans, including capitalized servicing rights	(34,951,000)	(11,834,000)
Loss on disposal of real estate held for sale and property and equipment, net	496,000	1,274,000
Provision for credit losses	64,917,000	6,000,000
Provision for credit losses - unfunded loan commitments	2,356,000	0
provision for losses, real estate held for sale	18,000	0
Origination of loans held for sale	(1,032,523,000)	(756,283,000)
Proceeds from sales of loans held for sale	1,091,984,000	694,259,000
Net change in:
Other assets	(51,796,000)	(26,381,000)
Other liabilities	5,040,000	8,398,000
Net cash provided from operating activities	138,162,000	68,492,000
INVESTING ACTIVITIES:
Purchases of securities—available-for-sale	(608,192,000)	(118,823,000)
Principal repayments and maturities of securities—available-for-sale	311,781,000	209,396,000
Proceeds from sales of securities—available-for-sale	128,939,000	43,114,000
Purchases of securities—held-to-maturity	(215,780,000)	(42,350,000)
Proceeds form the sale of equity securities	610,519,000	0
Principal repayments and maturities of securities—held-to-maturity	20,691,000	44,971,000
Purchases of equity securities	(1,060,000,000)	0
Loan originations, net of principal repayments	(855,936,000)	(158,754,000)
Purchases of loans and participating interest in loans	(18,000)	(8,608,000)
Proceeds from sales of other loans	8,454,000	16,279,000
Gain (Loss) on Disposition of Assets	0	(10,382,000)
Purchases of property and equipment	(9,936,000)	(16,738,000)
Proceeds from sale of real estate held for sale and sale of other property	2,869,000	6,809,000
Proceeds from FHLB stock repurchase program	52,164,000	130,073,000
Purchase of FHLB stock	(40,185,000)	(123,740,000)
Other	3,913,000	1,461,000
Net cash used in investing activities	(1,650,717,000)	(27,292,000)
FINANCING ACTIVITIES:
Increase in deposits, net	2,166,700,000	266,129,000
Proceeds from FHLBank Advance, Investing Activities	0	300,000,000
Repayments of long-term Federal Home Loan Bank Advances	0	(100,189,000)
Repayment of overnight and short term FHLB advances, net	(300,000,000)	(358,000,000)
Increase in other borrowings, net	58,508,000	1,019,000
Proceeds from Issuance of Subordinated Long-term Debt	98,027,000	0
Cash dividends paid	(79,655,000)	(42,073,000)
Taxes paid related to net share settlement of equity awards	1,447,000	1,904,000
Payments for Repurchase of Common Stock	31,775,000	53,922,000
Net cash provided from financing activities	1,910,358,000	11,060,000
NET CHANGE IN CASH AND CASH EQUIVALENTS	397,803,000	52,260,000
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	307,735,000	272,196,000
CASH AND CASH EQUIVALENTS, END OF PERIOD	705,538,000	324,456,000
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Interest paid in cash	31,817,000	45,348,000
Tax refunds received	27,515,000	18,220,000
NON-CASH INVESTING AND FINANCING TRANSACTIONS:
Loans, net of discounts, specific loss allowances and unearned income, transferred to real estate owned and other repossessed assets	1,588,000	$ 246,000
Dividends Payable	$ 1,179,000