Annual report [Section 13 and 15(d), not S-K Item 405]

PARENT COMPANY FINANCIAL INFORMATION (CONDENSED STATEMENTS OF CASH FLOWS) (Details)

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PARENT COMPANY FINANCIAL INFORMATION (CONDENSED STATEMENTS OF CASH FLOWS) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Operating activities:      
Net income $ 209,131 $ 201,818 $ 234,510
Adjustments to reconcile net income to net cash provided by operating activities:      
Depreciation of premises and equipment 12,754 12,913 14,157
Acquisition accounting amortization, net (21,309) 4,788 3,297
Less: valuation allowance (4,419) 0  
Net decrease (increase) in other assets (83) (23,177) (13,185)
Net increase in other liabilities 11,588 21,861 109,205
Net cash provided by operating activities 308,456 278,045 419,673
Investing activities:      
Proceeds from sale of former bank premises 7,369 56,462 13,538
Net cash received in acquisition 54,988 0 0
Net cash used in investing activities (295,687) (603,278) (1,277,408)
Financing activities:      
Net decrease in short-term borrowings (902,894) (398,004) 1,200,967
Dividends paid (123,875) (103,285) (98,767)
Issuance of common stock 228 778 3,875
Vesting of restricted stock, net of shares held for taxes (3,961) (2,494) (3,228)
Net cash used in financing activities (36,826) 383,416 375,182
Increase (decrease) in cash and cash equivalents (24,057) 58,183 (482,553)
Cash, cash equivalents and restricted cash at beginning of the period 378,131 319,948 802,501
Cash, cash equivalents and restricted cash at end of the period 354,074 378,131 319,948
Issuance of common stock in exchange for net assets in acquisitions 505,402 0 0
Assets acquired 2,946,897 0 0
Liabilities assumed 2,730,266 0 0
Parent Company [Member]      
Operating activities:      
Net income 209,131 201,818 234,510
Adjustments to reconcile net income to net cash provided by operating activities:      
Equity in undistributed net income of subsidiaries (117,173) (103,734) (145,985)
Non-cash dividend 0 0 (27,215)
Acquisition accounting amortization, net 1,078 851 829
Stock-based compensation expenses 13,796 11,101 10,609
Less: valuation allowance 4,419 0 0
Issuance of common stock for services 970 735 819
Net decrease (increase) in other assets 1,536 3,256 (9,663)
Net increase in other liabilities 1,040 13,201 761
Net cash provided by operating activities 114,797 127,228 64,665
Investing activities:      
Proceeds from sale of former bank premises 0 0 2,524
Increase in equity method investments (4,516) (7,363) (8,830)
Net cash received in acquisition 212 0 0
Net cash used in investing activities (4,304) (7,363) (6,306)
Financing activities:      
Dividends paid (123,875) (103,285) (98,767)
Repurchase of common stock 0 0 (48,231)
Issuance of common stock 228 778 3,875
Vesting of restricted stock, net of shares held for taxes (3,961) (2,494) (3,228)
Net cash used in financing activities (127,608) (105,001) (146,351)
Increase (decrease) in cash and cash equivalents (17,115) 14,864 (87,992)
Cash, cash equivalents and restricted cash at beginning of the period 32,336 17,472 105,464
Cash, cash equivalents and restricted cash at end of the period 15,221 32,336 17,472
Issuance of common stock in exchange for net assets in acquisitions 505,402 0 0
Assets acquired 521,218 0 0
Liabilities assumed $ 30,398 $ 0 $ 0