CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Cash Flows from Operating Activities
Net income	$ 74,151	$ 56,250
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	4,425	4,262
Accretion of discounts on securities, net	(1,974)	(1,455)
Amortization of operating lease ROUAs	4,487	4,087
Other amortization and accretion, net	1,280	1,068
Stock-based compensation	6,996	6,105
Origination of loans designated for sale	(44,862)	(58,002)
Sale of loans designated for sale	56,171	59,240
Provision for credit losses	13,629	6,286
Deferred income taxes	3,195	6,933
Gains on securities	(235)	(185)
Gains on sale of loans	(3,025)	(3,435)
Gains on sale of OREO, net of write-downs	(109)	(135)
Losses on disposition of fixed assets and write-downs upon transfer of bank premises to OREO	94	289
Changes in operating assets and liabilities, net of effects from acquired companies:
Net (increase) decrease in other assets	(11,699)	7,204
Net increase (decrease) in other liabilities	809	(6,977)
Net cash provided by operating activities	103,333	81,535
Cash Flows from Investing Activities
Maturities and repayments of debt securities AFS	208,717	144,875
Maturities and repayments of debt securities HTM	21,920	22,328
Proceeds from sale of debt securities AFS	0	86,829
Purchases of debt securities AFS	(794,370)	(376,726)
Maturities and redemptions of time deposits with other banks	1,721	1,483
Purchases of time deposits with other banks	0	(3,482)
Net new loans and principal repayments	(323,887)	12,219
Proceeds from the sale of loans held for investment	14,510	10,905
Proceeds from sale of OREO	2,707	2,654
Proceeds from sale of FHLB and Federal Reserve Bank stock	22,802	11,310
Purchase of FHLB and Federal Reserve Bank stock	(45,762)	(17,538)
Proceeds from BOLI death benefit	1,962	0
Proceeds from sale of Visa Class B shares	0	4,104
Additions to bank premises and equipment	(4,637)	(2,939)
Net cash used in investing activities	(894,317)	(103,978)
Cash Flows from Financing Activities
Net increase in deposits	255,171	339,184
Net decrease in repurchase agreements	(45,981)	(112,470)
Net increase of FHLB borrowings with original maturities of three months or less	100,000	0
Repayments of FHLB borrowings with original maturities of more than three months	(30,000)	(160,000)
Proceeds from FHLB borrowings with original maturities of more than three months	400,000	290,000
Stock-based employee benefit plans	(1,425)	(298)
Repurchase of common stock	0	(880)
Dividends paid	(30,960)	(30,750)
Net cash provided by financing activities	646,805	324,786
Net (decrease) increase in cash and cash equivalents	(144,179)	302,343
Cash and cash equivalents at beginning of period	476,607	447,182
Cash and cash equivalents at end of period	332,428	749,525
Supplemental disclosure of cash flow information:
Cash paid for interest	132,851	144,396
Cash paid for taxes, net	5,380	5,888
Recognition of operating lease ROUAs, other than through bank acquisitions, net of terminations	7,796	0
Recognition of operating lease liabilities, other than through bank acquisitions, net of terminations	7,796	0
Supplemental disclosure of non-cash investing activities:
Transfers from loans to OREO	1,116	953
Transfers from bank premises to OREO	$ 0	$ 883