Consolidated Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Operating activities
Net income	$ 78,255,000	$ 74,721,000
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Provision for credit losses	5,738,000	8,460,000
Depreciation, amortization and accretion	16,027,000	18,365,000
Deferred income tax expense	1,142,000	302,000
Proceeds from sale of MSR	23,011,000	0
Gain on sale of MSR	(3,472,000)	0
Funding of mortgage loans held for sale	(641,131,000)	(659,921,000)
Proceeds from sales of mortgage loans held for sale	561,475,000	526,853,000
Gains on sales of mortgage loans held for sale	(9,734,000)	(9,417,000)
Losses on sales of securities	0	22,438,000
Debt prepayment benefit	(56,000)	0
Losses on sales of premises and equipment	52,000	7,000
Stock-based compensation expense	7,366,000	6,840,000
Increase in other assets	(6,802,000)	(26,264,000)
(Decrease) increase in other liabilities	(15,891,000)	6,076,000
Net cash provided by (used in) operating activities	15,980,000	(31,540,000)
Investing activities
Purchases of securities available for sale	(52,679,000)	0
Proceeds from sales of securities available for sale	177,185,000	488,981,000
Proceeds from call/maturities of securities available for sale	42,713,000	90,830,000
Proceeds from call/maturities of securities held to maturity	50,372,000	54,123,000
Net increase in loans	(258,608,000)	(363,231,000)
Purchases of premises and equipment	(6,774,000)	(12,353,000)
Proceeds from sales of premises and equipment	289,000	0
Net change in FHLB stock	2,665,000	13,268,000
Proceeds from sales of other assets	1,167,000	827,000
Other, net	191,000	1,668,000
Net cash (used in) provided by investing activities	(43,479,000)	274,113,000
Financing activities
Net decrease in noninterest-bearing deposits	(44,222,000)	(679,803,000)
Net increase in interest-bearing deposits	222,650,000	1,288,198,000
Net decrease in short-term borrowings	(74,836,000)	(454,927,000)
Repayment of long-term debt	(245,000)	0
Cash paid for dividends	(25,293,000)	(25,134,000)
Net cash provided by financing activities	78,054,000	128,334,000
Net increase in cash and cash equivalents	50,555,000	370,907,000
Cash and cash equivalents at beginning of period	801,351,000	575,992,000
Cash and cash equivalents at end of period	851,906,000	946,899,000
Supplemental disclosures
Cash paid for interest	187,194,000	91,861,000
Cash paid for income taxes	17,958,000	23,071,000
Noncash transactions:
Transfers of loans to other real estate owned	1,135,000	4,119,000
Recognition of operating right-of-use assets	1,562,000	611,000
Recognition of operating lease liabilities	$ 1,562,000	$ 611,000