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Shareholders' Equity - Additional Information (Detail) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Feb. 25, 2021
Class of Stock [Line Items] |  |  |  |
Cash dividends received | $ 64,188,000 | $ 31,571,000 | $ 63,419,000 |
Stock repurchase plan, amount of shares repurchased | 27,148,000 | 4,958,000 | 27,069,000 |
Market value of shares repurchased under equity compensation plans | $ 2,522,000 | $ 2,118,000 | $ 736,000 |
Stock options |  |  |  |
Class of Stock [Line Items] |  |  |  |
Company's common stock in lieu of cash to exercise options to purchase shares (in shares) | 39,447 | 28,276 | 12,488 |
Other share-based awards |  |  |  |
Class of Stock [Line Items] |  |  |  |
Company's common stock in lieu of cash to exercise options to purchase shares (in shares) | 27,840 | 19,413 | 12,058 |
Maximum |  |  |  |
Class of Stock [Line Items] |  |  |  |
Amount available to dividend to holding company | $ 157,036,000 |  |  |
2021 Stock Repurchase Plan |  |  |  |
Class of Stock [Line Items] |  |  |  |
Repurchase of common stock (in shares) |  |  |  | 2,000,000
Stock repurchase plan percentage of common stock |  |  |  | 6.70%
Cumulative number of shares repurchased (in shares) | 576,881 | 63,317 |  |
2019 Stock Repurchase Plan |  |  |  |
Class of Stock [Line Items] |  |  |  |
Cumulative number of shares repurchased (in shares) |  | 223 | 858,717 |
Common Stock |  |  |  |
Class of Stock [Line Items] |  |  |  |
Stock repurchase plan, number of shares repurchased (in shares) | 644,168 | 111,229 | 883,263 |
Stock repurchase plan, amount of shares repurchased | $ 13,440,000 | $ 1,987,000 | $ 15,746,000 |
Market value of shares repurchased under equity compensation plans | $ 1,269,000 | $ 2,118,000 | $ 736,000 |

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