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PARENT COMPANY FINANCIAL INFORMATION (CONDENSED STATEMENTS OF CASH FLOWS) (Details) - USD ($) $ in Thousands | 12 Months Ended
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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

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