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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, 2019	Dec. 31, 2018	Dec. 31, 2017
Deferred Policy Acquisition Costs [Roll Forward]
DPAC, beginning of year	$ 84,686	$ 73,059	$ 64,912
Capitalized Costs	184,039	174,814	144,849
Amortization of DPAC	(176,843)	(163,187)	(136,702)
DPAC, end of year	$ 91,882	$ 84,686	$ 73,059

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- Definition

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

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