CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Cash Flows from Operating Activities
Net income	$ 86,901	$ 74,490
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	6,381	6,090
Accretion of discounts on securities, net	(2,371)	(798)
Amortization of operating lease right-of-use assets	6,148	5,993
Other amortization and accretion, net	(14,678)	(14,952)
Stock based compensation	10,233	10,290
Origination of loans designated for sale	(82,146)	(82,695)
Sale of loans designated for sale	79,187	86,221
Provision for credit losses	12,559	33,528
Deferred income taxes	7,321	(3,348)
(Gains) losses on securities	(372)	456
Gains on sale of loans	(4,251)	(2,993)
Losses (gains) on sale and write-downs of other real estate owned	134	(37)
Losses on disposition of fixed assets and write-downs upon transfer of bank premises to other real estate owned	284	1,755
Changes in operating assets and liabilities, net of effects from acquired companies:
Net decrease in other assets	24,973	5,046
Net increase in other liabilities	4,606	1,684
Net cash provided by operating activities	134,909	120,730
Cash Flows from Investing Activities
Maturities and repayments of debt securities available-for-sale	269,277	153,866
Maturities and repayments of debt securities held-to-maturity	34,361	58,357
Proceeds from sale of debt securities available-for-sale	104,425	30,490
Purchases of debt securities available-for-sale	(651,360)	(28,095)
Maturities and redemptions of time deposits with other banks	4,132	1,492
Purchases of time deposits with other banks	(3,482)	(2,613)
Net new loans and principal repayments	(158,095)	159,298
Proceeds from the sale of loans held for investment	10,905	0
Proceeds from sale of other real estate owned	2,841	577
Proceeds from sale of FHLB and Federal Reserve Bank Stock	11,310	73,473
Purchase of FHLB and Federal Reserve Bank Stock	(20,743)	(90,896)
Proceeds from sale of Visa Class B shares	4,104	0
Net cash from bank acquisitions	0	141,674
Additions to bank premises and equipment	(3,884)	(9,665)
Net cash (used in) provided by investing activities	(396,209)	487,958
Cash Flows from Financing Activities
Net increase in deposits	466,651	6,898
Net (decrease) increase in repurchase agreements	(164,397)	104,421
Net decrease in FHLB borrowings with original maturities of three months or less	0	(220,000)
Repayments of FHLB borrowings with original maturities of more than three months	(160,000)	(75,000)
Proceeds from FHLB borrowings with original maturities of more than three months	355,000	110,000
Stock based employee benefit plans	972	4,316
Repurchase of common stock	(880)	(45)
Dividends paid	(46,170)	(45,236)
Net cash provided by (used in) financing activities	451,176	(114,646)
Net increase in cash and cash equivalents	189,876	494,042
Cash and cash equivalents at beginning of period	447,182	201,940
Cash and cash equivalents at end of period	637,058	695,982
Supplemental disclosure of cash flow information:
Cash paid for interest	219,201	124,927
Cash paid (refunded) for taxes, net	10,888	(7,920)
Recognition of operating lease right-of-use assets, other than through bank acquisitions, net of terminations	0	2,068
Recognition of operating lease liabilities, other than through bank acquisitions, net of terminations	0	2,080
Supplemental disclosure of non-cash investing activities:
Transfers from loans to other real estate owned	953	0
Transfers from bank premises to other real estate owned	$ 883	$ 5,455