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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
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Deferred Policy Acquisition Costs [Roll Forward]
DPAC, beginning of period	$ 111,193	$ 94,354	$ 110,614	$ 91,882
Capitalized Costs	61,220	57,465	115,942	105,973
Amortization of DPAC	(56,442)	(48,292)	(110,585)	(94,328)
DPAC, end of period	$ 115,971	$ 103,527	$ 115,971	$ 103,527

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- Definition

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

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