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Share Repurchase Programs (Detail) - USD ($) | 3 Months Ended | 101 Months Ended |
--- | --- | --- | ---
Dec. 31, 2022 | Dec. 31, 2022 | Aug. 31, 2014
Equity [Abstract] |  |  |
Stock repurchase program, authorized amount |  |  | $ 50,000,000
Purchase of common stock, shares (in shares) | 0 | 1,416,587 |
Common stock repurchased |  | $ 22,000,000 |
Remaining repurchase amount | $ 28,000,000 | $ 28,000,000 |

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