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Insurance Operations - Beginning and Ending Balances and Changes in DPAC, Net of DRCC (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Deferred Policy Acquisition Costs [Roll Forward]
DPAC, beginning of period	$ 110,614	$ 91,882
Capitalized Costs	54,722	48,508
Amortization of DPAC	(54,143)	(46,036)
DPAC, end of period	$ 111,193	$ 94,354

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- Definition

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

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