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Insurance Operations - Beginning and Ending Balances and Changes in DPAC, Net of DRCC (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Deferred Policy Acquisition Costs [Roll Forward] |  |  |  |
DPAC, beginning of period | $ 106,632 | $ 97,893 | $ 109,985 | $ 103,654
Capitalized Costs | 66,544 | 60,893 | 117,396 | 106,887
Amortization of DPAC | (56,032) | (51,739) | (110,237) | (103,494)
DPAC, end of period | $ 117,144 | $ 107,047 | $ 117,144 | $ 107,047

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