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Insurance Operations - Beginning and Ending Balances and Changes in DPAC (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Insurance [Abstract]
DPAC, beginning of period	$ 78,007	$ 66,524	$ 73,059	$ 64,912
Capitalized Costs	50,430	39,898	92,369	73,654
Amortization of DPAC	(39,681)	(32,831)	(76,672)	(64,975)
DPAC, end of period	$ 88,756	$ 73,591	$ 88,756	$ 73,591

X

- Definition

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

+ References

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X

- Definition

Net amount of deferred policy acquisition costs capitalized on contracts remaining in force as of the balance sheet date.

+ References

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- Definition

Total amount of policy acquisition costs capitalized during the income statement period.

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