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Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands | Total | Cumulative Effect, Period of Adoption, Adjustment | Cumulative Effect, Period of Adoption, Adjusted Balance | Preferred Stock [Member] | Common Stock [Member] | Retained Earnings | Retained Earnings Cumulative Effect, Period of Adoption, Adjustment | Retained Earnings Cumulative Effect, Period of Adoption, Adjusted Balance | Treasury Stock [Member] | AOCI Attributable to Parent [Member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2019 |  |  |  | $ 0 | $ 459,389 | $ 646,847 |  |  | $ (127,633) | $ (9,589)
Beginning balance, shares at Dec. 31, 2019 |  |  |  | 0 | 16,346,442 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |
Net Income (Loss) Attributable to Parent | $ 127,923 |  |  |  |  | 127,923 |  |  |  |
Other Comprehensive Income (Loss), Net of Tax | 15,160 |  |  |  |  |  |  |  |  | 15,160
Dividends, Common Stock, Cash |  |  |  |  |  | 70,601 |  |  |  |
Stock Issued During Period, Shares, Dividend Reinvestment Plan |  |  |  |  | 36 |  |  |  |  |
Stock Issued During Period, Value, Dividend Reinvestment Plan |  |  |  |  | $ 3 |  |  |  |  |
Allocated Share-based Compensation Expense | $ 6,000 |  |  |  | $ 5,998 |  |  |  |  |
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures |  |  |  |  | 30,341 |  |  |  |  |
Stock Granted, Value, Share-based Compensation, Net of Forfeitures |  |  |  |  | $ (4,697) | (664) |  |  | (3,031) |
Treasury Stock, Shares, Acquired |  |  |  |  | 76,000 |  |  |  |  |
Treasury Stock, Value, Acquired, Cost Method |  |  |  |  |  |  |  |  | (7,507) |
Treasury Stock Reissued Shares For Director Grants | 13,450 |  |  |  | 13,450 |  |  |  |  |
Treasury shares reissued for director grants |  |  |  |  |  | 69 |  |  | 1,343 |
Ending balance, shares at Dec. 31, 2020 |  |  |  | 0 | 16,314,197 |  |  |  |  |
Ending balance at Dec. 31, 2020 | $ 1,040,256 | $ (7,956) | $ 1,032,300 | $ 0 | $ 460,687 | 704,764 |  |  | (130,766) | 5,571
Ending balance (Accounting Standards Update 2016-13) at Dec. 31, 2020 |  |  |  |  |  |  | $ (7,956) | $ 696,808 |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |
Common Stock, Dividends, Per Share, Cash Paid | $ 4.28 |  |  |  |  |  |  |  |  |
Net Income (Loss) Attributable to Parent | $ 153,945 |  |  |  |  | 153,945 |  |  |  |
Other Comprehensive Income (Loss), Net of Tax | 9,584 |  |  |  |  |  |  |  |  | 9,584
Dividends, Common Stock, Cash |  |  |  |  |  | 74,634 |  |  |  |
Stock Issued During Period, Shares, Dividend Reinvestment Plan |  |  |  |  | 45 |  |  |  |  |
Stock Issued During Period, Value, Dividend Reinvestment Plan |  |  |  |  | $ 6 |  |  |  |  |
Allocated Share-based Compensation Expense | $ 6,300 |  |  |  | $ 6,345 |  |  |  |  |
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures |  |  |  |  | 29,670 |  |  |  |  |
Stock Granted, Value, Share-based Compensation, Net of Forfeitures |  |  |  |  | $ (5,226) | (141) |  |  | (2,964) |
Treasury Stock, Shares, Acquired |  |  |  |  | 137,659 |  |  |  |  |
Treasury Stock, Value, Acquired, Cost Method |  |  |  |  |  |  |  |  | (16,048) |
Treasury Stock Reissued Shares For Director Grants | 13,400 |  |  |  | 13,400 |  |  |  |  |
Treasury shares reissued for director grants |  |  |  |  |  | 316 |  |  | 1,360 |
Ending balance, shares at Dec. 31, 2021 |  |  |  | 0 | 16,219,563 |  |  |  |  |
Ending balance at Dec. 31, 2021 | $ 1,110,759 | $ (8,000) |  | $ 0 | $ 461,800 | 776,294 |  |  | (142,490) | 15,155
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |
Common Stock, Dividends, Per Share, Cash Paid | $ 4.52 |  |  |  |  |  |  |  |  |
Net Income (Loss) Attributable to Parent | $ 148,351 |  |  |  |  | 148,351 |  |  |  |
Other Comprehensive Income (Loss), Net of Tax | (117,549) |  |  |  |  |  |  |  |  | (117,549)
Dividends, Common Stock, Cash |  |  |  |  |  | 76,771 |  |  |  |
Stock Issued During Period, Shares, Dividend Reinvestment Plan |  |  |  |  | 14 |  |  |  |  |
Stock Issued During Period, Value, Dividend Reinvestment Plan |  |  |  |  | $ 2 |  |  |  |  |
Allocated Share-based Compensation Expense | $ 5,900 |  |  |  | $ 5,879 |  |  |  |  |
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures |  |  |  |  | 34,245 |  |  |  |  |
Stock Granted, Value, Share-based Compensation, Net of Forfeitures |  |  |  |  | $ (5,273) | (965) |  |  | (3,477) |
Treasury Stock Reissued Shares For Director Grants | 9,789 |  |  |  | 9,789 |  |  |  |  |
Treasury shares reissued for director grants |  |  |  |  |  | 326 |  |  | 994 |
Ending balance, shares at Dec. 31, 2022 |  |  |  | 0 | 16,263,583 |  |  |  |  |
Ending balance at Dec. 31, 2022 | $ 1,069,226 |  |  | $ 0 | $ 462,404 | $ 847,235 |  |  | $ (138,019) | $ (102,394)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |
Common Stock, Dividends, Per Share, Cash Paid | $ 4.66 |  |  |  |  |  |  |  |  |

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