Reinsurance - Schedule of the Amounts Recoverable from Reinsurers (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Unpaid losses recoverable:
Case basis	$ 49,361	$ 37,207
Incurred but not reported	28,895	27,651
Paid losses recoverable	485	414
Experience-rated commissions recoverable	4,925	25,805
Total reinsurance recoverables	$ 83,666	$ 91,077