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Insurance Operations - Beginning and Ending Balances and Changes in DPAC, Net of DRCC (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Deferred Policy Acquisition Costs [Roll Forward]
DPAC, beginning of year	$ 110,614	$ 91,882	$ 84,686
Capitalized Costs	222,329	217,886	184,039
Amortization of DPAC	(224,121)	(199,154)	(176,843)
DPAC, end of year	$ 108,822	$ 110,614	$ 91,882

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Amount of amortization expense (reversal of expense) for deferred policy acquisition costs.

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