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Insurance Operations - Beginning and Ending Balances and Changes in DPAC (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Insurance [Abstract]
DPAC, beginning of period	$ 73,059	$ 64,912
Capitalized Costs	41,939	33,756
Amortization of DPAC	(36,991)	(32,144)
DPAC, end of period	$ 78,007	$ 66,524

X

- Definition

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

+ References

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

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