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Share Repurchase Plan - Additional Information (Detail) - $ / shares | 1 Months Ended | 3 Months Ended | 147 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2024 | Feb. 29, 2024 | Feb. 28, 2023 | Feb. 29, 2024 | Nov. 30, 2023 | Oct. 06, 2016 | Apr. 08, 2015 | Jun. 06, 2012 | Dec. 31, 2011
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |
Number of shares authorized to repurchase |  |  |  |  |  | 8,000,000 | 6,000,000 | 3,000,000 | 1,000,000
Share repurchase plan |  | open market purchases, privately negotiated block trades, unsolicited negotiated transactions, and/or pursuant to any trading plan that may be adopted in accordance with Rule 10b5-1 of the Securities and Exchange Commission |  |  |  |  |  |  |
Treasury stock, common, shares |  | 6,594,269 |  | 6,594,269 | 6,562,461 |  |  |  |
Common Stock [Member] |  |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |
Treasury stock, common, shares |  | 6,594,269 |  | 6,594,269 |  |  |  |  |
Repurchase agreement, purchase price per share |  | $ 5.36 | $ 4.25 | $ 3.58 |  |  |  |  |
Number of shares repurchased |  | 31,808 | 57,281 |  |  |  |  |  |
Common Stock [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |
Repurchase agreement, purchase price per share | $ 6.16 |  |  |  |  |  |  |  |
Number of shares repurchased | 150,500 |  |  |  |  |  |  |  |

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