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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, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Deferred Policy Acquisition Costs [Roll Forward] |  |  |  |
DPAC, beginning of period | $ 103,622 | $ 111,193 | $ 108,822 | $ 110,614
Capitalized Costs | 61,232 | 61,220 | 110,431 | 115,942
Amortization of DPAC | (53,871) | (56,442) | (108,270) | (110,585)
DPAC, end of period | $ 110,983 | $ 115,971 | $ 110,983 | $ 115,971

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