Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash Flows From Operating Activities:
Net Income	$ 80,309	$ 98,737
Adjustments to reconcile Net Income to net cash provided by operating activities:
Provision for credit losses	17,046	730
Provision for credit losses for unfunded commitments	327	1,316
Depreciation and amortization	2,649	2,483
Gain on sale of loans	(395)	(3,168)
Loss (gain) on mortgage servicing rights	108	(872)
Securities premium amortization, net	4,766	7,191
Origination of loans held for sale	(29,690)	(264,765)
Proceeds from sale of loans held for sale	36,819	305,764
Net gain on sale of other real estate owned	(134)	(107)
Net loss on sale of investment securities	14	172
Net increase in cash surrender value of BOLI	(1,972)	(1,889)
Stock-based compensation expense	7,653	7,587
Increase in other assets	(29,589)	(19,055)
Increase in other liabilities	51,058	5,503
Net Cash Provided by Operating Activities	138,969	139,627
Investment securities available-for-sale:
Purchases	0	(414,935)
Proceeds from maturities	92,647	182,767
Proceeds from sale/call	8,303	6,225
Investment securities held-to-maturity:
Purchases	0	(290,740)
Proceeds from maturities	60,312	82,163
Proceeds from call	2,906	19,944
Proceeds from (purchase of) sale of Federal Reserve stock	39,378	(8,158)
Net increase in loans	(287,673)	(239,089)
Redemption of BOLI	736	0
Proceeds from sale of OREO	609	241
Net change in premises and equipment	(298)	(1,518)
Net Cash Used in Investing Activities	(83,080)	(663,100)
Cash Flows From Financing Activities:
Decrease in deposits	(336,876)	(1,218,190)
Decrease in customer repurchase agreements	(9,411)	(2,453)
Proceeds from short-term borrowings	325,000	215,000
Proceeds from employee stock purchase plan	459	558
Proceeds from exercise of equity compensation plans	0	97
Common stock repurchased	(48,035)	0
Cash dividends paid	(40,825)	(41,586)
Net Cash Used in Financing Activities	(109,688)	(1,046,574)
Net Decrease in Cash and Cash Equivalents	(53,799)	(1,570,047)
Cash and Cash Equivalents at Beginning of Period	311,854	1,714,222
Cash and Cash Equivalents at End of Period	258,055	144,175
Supplemental Cash Flows Information:
Interest paid	266,633	49,273
Income taxes paid	16,940	16,150
Non-Cash Investing Activities
Transfers of investment securities from available-for-sale to held-to-maturity	0	922,795
Transfers from loans to other real estate owned	$ 0	$ 475