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Parent Company Cash Flow Statement (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Net income |  | $ 192,081 | $ 239,502 | $ 263,813
Adjustments to reconcile net income to net cash provided by operating activities |  |  |  |
Deferred income tax (benefit) expense |  | (10,600) | 2,738 | (1,254)
Change in other liabilities |  | 5,543 | (20,614) | 55,224
Net cash provided by operating activities |  | 229,921 | 276,994 | 421,200
Cash flows used in investing activities |  |  |  |
Net cash used in investing activities |  | (33,010) | (211,650) | (1,000,474)
Cash flows used in financing activities |  |  |  |
Net cash used in financing activities |  | (201,351) | (193,947) | (1,308,477)
Payments for Repurchase of Common Stock |  | (30,986) | (188,910) | (139,946)
Cash received from stock option exercises |  | 80 | 80 | 0
Proceeds from shares issued under direct stock purchase plan |  | 3,254 | 2,662 | 2,359
Common dividends paid |  | (96,200) | (98,006) | (93,734)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect |  | (4,440) | (128,603) | (1,887,751)
Issuance Of Restricted Stock Awards, Net of Issuance Cost |  | 815 | 1,142 | 1,084
Repayments of Subordinated Debt |  | (50,000) | 0 | 0
Parent Company [Member] |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Investments in subsidiaries | [1] | 2,967,786 | 2,922,698 |
Net income |  | 192,081 | 239,502 | 263,813
Adjustments to reconcile net income to net cash provided by operating activities |  |  |  |
Amortization |  | 22 | 98 | 96
Deferred income tax (benefit) expense |  | (1) | 24 | 28
Change in prepaid income taxes and other assets |  | 179 | 2,107 | (623)
Change in other liabilities |  | (2,560) | 52 | 143
Equity in undistributed income of subsidiaries |  | 13,745 | 17,656 | 59,131
Net cash provided by operating activities |  | 175,976 | 224,127 | 204,326
Cash flows used in financing activities |  |  |  |
Net cash used in financing activities |  | (174,667) | (285,316) | (246,468)
Cash and cash equivalents at beginning of year |  | 108,788 | 169,977 | 212,119
Cash and cash equivalents at end of period |  | 110,097 | 108,788 | 169,977
Cash | [2] | 110,097 | 108,788 |
Payments for Repurchase of Common Stock |  | (30,986) | (188,910) | (139,946)
Repayments of Long-term Debt |  | 0 | 0 | (14,063)
Cash received from stock option exercises |  | 80 | 80 | 0
Proceeds from shares issued under direct stock purchase plan |  | 3,254 | 2,662 | 2,359
Common dividends paid |  | (96,200) | (98,006) | (93,734)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect |  | 1,309 | (61,189) | (42,142)
Issuance Of Restricted Stock Awards, Net of Issuance Cost |  | (815) | (1,142) | (1,084)
Subordinated Debt [Member] | Parent Company [Member] |  |  |  |
Cash flows used in financing activities |  |  |  |
Repayments of Subordinated Debt |  | $ 50,000 | $ 0 | $ 0
[1] | Majority of balance eliminates in consolidation
[2] | Entire balance eliminates in consolidation.

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