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Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands | Cumulative Effect, Period of Adoption, Adjustment [Member] Common Stock Outstanding [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] Additional Paid-in Capital [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] AOCI Attributable to Parent [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] Retained Earnings [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] Treasury Stock [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Common Stock Outstanding [Member] | Additional Paid-in Capital [Member] | AOCI Attributable to Parent [Member] | Retained Earnings [Member] | Treasury Stock [Member] | Total
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance (in shares) at Dec. 31, 2019 |  |  |  |  |  |  |  | 79,729,419 |  |  |  |  |
Beginning balance, loss, net of tax at Dec. 31, 2019 |  |  |  |  |  |  |  | $ 900 | $ 950,466 | $ 2,302 | $ 1,659,153 | $ (318,538) | $ 2,294,283
Dividend Reinvestment Plan (in shares) |  |  |  |  |  |  |  | 358,157 |  |  |  |  | 358,157
Dividend Reinvestment Plan |  |  |  |  |  |  |  | $ 4 | 9,773 | 0 | 0 | 0 | $ 9,777
Restricted stock units vested (in shares) |  |  |  |  |  |  |  | 189,557 |  |  |  |  |
Restricted stock units vested |  |  |  |  |  |  |  | $ 2 | 0 | 0 | 0 | 0 | 2
Shares withheld related to net share settlement of RSUs |  |  |  |  |  |  |  | $ 0 | (1,911) | 0 | 0 | 0 | (1,911)
Stock issued to directors (in shares) |  |  |  |  |  |  |  | 31,110 |  |  |  |  |
Stock issued to directors |  |  |  |  |  |  |  | $ 0 | 800 | 0 | 0 | 0 | 800
Purchases of treasury stock (in shares) |  |  |  |  |  |  |  | (799,978) |  |  |  |  |
Purchases of treasury stock |  |  |  |  |  |  |  | $ 0 | 0 | 0 | 0 | (23,593) | (23,593)
Stock -based compensation |  |  |  |  |  |  |  | 0 | 5,606 | 0 | 0 | 0 | 5,606
Cash dividends |  |  |  |  |  |  |  | 0 | 0 | 0 | (98,688) | 0 | (98,688)
Other comprehensive income/(loss) |  |  |  |  |  |  |  | 0 | 0 | 3,008 | 0 | 0 | 3,008
Net income |  |  |  |  |  |  |  | $ 0 | 0 | 0 | 228,860 | 0 | 228,860
Balance (in shares) at Dec. 31, 2020 |  |  |  |  |  |  |  | 79,508,265 |  |  |  |  |
Ending balance, loss, net of tax (Accounting Standards Update 2016-13 [Member]) at Dec. 31, 2020 | [1] | $ 0 | $ 0 | $ 0 | $ (3,139) | $ 0 | $ (3,139) |  |  |  |  |  |
Ending balance, loss, net of tax at Dec. 31, 2020 |  |  |  |  |  |  |  | $ 906 | 964,734 | 5,310 | 1,789,325 | (342,131) | $ 2,418,144
Dividend Reinvestment Plan (in shares) |  |  |  |  |  |  |  | 84,011 |  |  |  |  | 84,011
Dividend Reinvestment Plan |  |  |  |  |  |  |  | $ 1 | 3,562 | 0 | 0 | 0 | $ 3,563
Restricted stock units vested (in shares) |  |  |  |  |  |  |  | 123,893 |  |  |  |  |
Restricted stock units vested |  |  |  |  |  |  |  | $ 2 | 0 | 0 | 0 | 0 | 2
Shares withheld related to net share settlement of RSUs |  |  |  |  |  |  |  | $ 0 | (2,632) | 0 | 0 | 0 | (2,632)
Stock issued to directors (in shares) |  |  |  |  |  |  |  | 20,750 |  |  |  |  |
Stock issued to directors |  |  |  |  |  |  |  | $ 0 | 850 | 0 | 0 | 0 | 850
Purchases of treasury stock (in shares) |  |  |  |  |  |  |  | (3,986,057) |  |  |  |  |
Purchases of treasury stock |  |  |  |  |  |  |  | $ 0 | 0 | 0 | 0 | (167,104) | (167,104)
Stock -based compensation |  |  |  |  |  |  |  | 0 | 5,960 | 0 | 0 | 0 | 5,960
Cash dividends |  |  |  |  |  |  |  | 0 | 0 | 0 | (99,322) | 0 | (99,322)
Other comprehensive income/(loss) |  |  |  |  |  |  |  | 0 | 0 | (8,375) | 0 | 0 | (8,375)
Net income |  |  |  |  |  |  |  | $ 0 | 0 | 0 | 298,304 | 0 | 298,304
Balance (in shares) at Dec. 31, 2021 |  |  |  |  |  |  |  | 75,750,862 |  |  |  |  |
Ending balance, loss, net of tax at Dec. 31, 2021 |  |  |  |  |  |  |  | $ 909 | 972,474 | (3,065) | 1,985,168 | (509,235) | $ 2,446,251
Dividend Reinvestment Plan (in shares) |  |  |  |  |  |  |  | 86,501 |  |  |  |  | 86,501
Dividend Reinvestment Plan |  |  |  |  |  |  |  | $ 1 | 3,718 | 0 | 0 | 0 | $ 3,719
Restricted stock units vested (in shares) |  |  |  |  |  |  |  | 112,473 |  |  |  |  |
Restricted stock units vested |  |  |  |  |  |  |  | $ 1 | 0 | 0 | 0 | 0 | 1
Shares withheld related to net share settlement of RSUs |  |  |  |  |  |  |  | $ 0 | (2,905) | 0 | 0 | 0 | (2,905)
Stock issued to directors (in shares) |  |  |  |  |  |  |  | 19,780 |  |  |  |  |
Stock issued to directors |  |  |  |  |  |  |  | $ 0 | 849 | 0 | 0 | 0 | $ 849
Purchases of treasury stock (in shares) |  |  |  |  |  |  |  | (3,227,465) |  |  |  |  | (3,227,465)
Purchases of treasury stock |  |  |  |  |  |  |  | $ 0 | 0 | 0 | 0 | (141,315) | $ (141,315)
Stock -based compensation |  |  |  |  |  |  |  | 0 | 6,983 | 0 | 0 | 0 | 6,983
Cash dividends |  |  |  |  |  |  |  | 0 | 0 | 0 | (100,955) | 0 | (100,955)
Other comprehensive income/(loss) |  |  |  |  |  |  |  | 0 | 0 | (99,230) | 0 | 0 | (99,230)
Net income |  |  |  |  |  |  |  | $ 0 | 0 | 0 | 360,642 | 0 | 360,642
Balance (in shares) at Dec. 31, 2022 |  |  |  |  |  |  |  | 72,742,151 |  |  |  |  |
Ending balance, loss, net of tax at Dec. 31, 2022 |  |  |  |  |  |  |  | $ 911 | $ 981,119 | $ (102,295) | $ 2,244,855 | $ (650,550) | $ 2,474,040
[1] | Represents the impact of the adoption of Accounting Standards Update ASU 2016-13, Financial Instruments - Credit Losses (Topic 326) on January 1, 2021.

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