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Note 22 - Parent Company Financial Information - Statements of Cash Flow (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Operating activities |  |  |
Net income | $ 206,853 | $ 251,504 | $ 207,734
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Net cash (used in) provided by operating activities | 197,296 | 272,627 | 266,331
Investing activities |  |  |
Net cash used in investing activities | (200,432) | (2,642,217) | (1,561,094)
Financing activities |  |  |
Net change in cash and cash equivalents | 1,315,035 | (3,406,043) | 2,010,685
Cash and cash equivalents at beginning of year | 816,053 | 4,222,096 | 2,211,411
Cash and cash equivalents at end of year | 2,131,088 | 816,053 | 4,222,096
Parent Company [Member] |  |  |
Operating activities |  |  |
Net income | 206,791 | 251,442 | 207,672
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Other | 2,227 | (290) | (93)
Equity in undistributed earnings of subsidiary | (147,076) | (197,221) | (164,387)
Net cash (used in) provided by operating activities | 61,945 | 53,931 | 43,192
Investing activities |  |  |
Other | (300) | 750 | (120)
Net cash used in investing activities | (300) | 750 | (120)
Financing activities |  |  |
Dividends paid on common stock | (60,923) | (49,942) | (43,204)
Net cash used in financing activities | (60,923) | (49,942) | (43,204)
Net change in cash and cash equivalents | 722 | 4,739 | (132)
Cash and cash equivalents at beginning of year | 19,292 | 14,553 | 14,685
Cash and cash equivalents at end of year | $ 20,014 | $ 19,292 | $ 14,553

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