Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Operating activities
Net income	$ 39,409,000	$ 46,078,000
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Provision for credit losses	2,438,000	6,460,000
Depreciation, amortization and accretion	8,097,000	9,237,000
Deferred income tax expense	1,706,000	2,667,000
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	(260,424,000)	(258,946,000)
Proceeds from sales of mortgage loans held for sale	250,399,000	212,755,000
Gains on sales of mortgage loans held for sale	(4,535,000)	(4,769,000)
Debt prepayment benefit	(56,000)	0
Losses on sales of premises and equipment	50,000	2,000
Stock-based compensation expense	3,992,000	3,445,000
Decrease (increase) in other assets	9,904,000	(10,945,000)
Increase in other liabilities	(5,462,000)	(13,366,000)
Net cash provided by (used in) operating activities	65,057,000	(7,382,000)
Investing activities
Purchases of securities available for sale	(46,975,000)	0
Proceeds from sales of securities available for sale	177,185,000	0
Proceeds from call/maturities of securities available for sale	22,148,000	45,342,000
Proceeds from call/maturities of securities held to maturity	24,159,000	25,424,000
Net increase in loans	(148,854,000)	(195,617,000)
Purchases of premises and equipment	(3,296,000)	(8,237,000)
Proceeds from sales of premises and equipment	256,000	0
Net change in FHLB stock	5,120,000	(22,130,000)
Proceeds from sales of other assets	132,000	647,000
Other, net	93,000	1,340,000
Net cash provided by (used in) investing activities	29,968,000	(153,231,000)
Financing activities
Net decrease in noninterest-bearing deposits	(67,511,000)	(313,879,000)
Net increase in interest-bearing deposits	227,889,000	738,933,000
Net (decrease) increase in short-term borrowings	(199,456,000)	19,825,000
Repayment of long-term debt	(245,000)	0
Cash paid for dividends	(12,653,000)	(12,561,000)
Net cash (used in) provided by financing activities	(51,976,000)	432,318,000
Net increase in cash and cash equivalents	43,049,000	271,705,000
Cash and cash equivalents at beginning of period	801,351,000	575,992,000
Cash and cash equivalents at end of period	844,400,000	847,697,000
Supplemental disclosures
Cash paid for interest	91,121,000	41,239,000
Cash paid for income taxes	0	17,443,000
Noncash transactions:
Transfers of loans to other real estate owned	195,000	3,623,000
Recognition of operating right-of-use assets	1,157,000	531,000
Recognition of operating lease liabilities	$ 1,157,000	$ 531,000