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Insurance Operations - Beginning and Ending Balances and Changes in DPAC, Net of DRCC (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Deferred Policy Acquisition Costs [Roll Forward] |  |  |
DPAC, beginning of year | $ 103,654 | $ 108,822 | $ 110,614
Capitalized Costs | 217,286 | 212,067 | 222,329
Amortization of DPAC | (210,955) | (217,235) | (224,121)
DPAC, end of year | $ 109,985 | $ 103,654 | $ 108,822

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