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Insurance Operations - Beginning and Ending Balances and Changes in DPAC (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Deferred Policy Acquisition Costs [Roll Forward]
DPAC, beginning of period	$ 90,530	$ 88,756	$ 84,686	$ 73,059
Capitalized Costs	48,783	44,389	140,998	136,758
Amortization of DPAC	(44,493)	(42,502)	(130,864)	(119,174)
DPAC, end of period	$ 94,820	$ 90,643	$ 94,820	$ 90,643

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- Definition

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

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