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Insurance Operations - Change in Liability for Unpaid Losses and LAE (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Insurance [Abstract]        
Balance at beginning of period $ 84,975 $ 125,161 $ 98,840 $ 134,353
Less: Reinsurance recoverable (7,709) (42,713) (13,540) (47,350)
Net balance at beginning of period 77,266 82,448 85,300 87,003
Incurred (recovered) related to current year 60,084 39,637 126,185 73,200
Incurred (recovered) related to prior years (1) 67 15 94
Total incurred 60,083 39,704 126,200 73,294
Paid related to Current year 54,041 23,830 72,659 30,623
Paid related to Prior years 26,122 17,982 81,655 49,334
Total paid 80,163 41,812 154,314 79,957
Net balance at end of period 57,186 80,340 57,186 80,340
Plus: Reinsurance recoverable 2,958 31,777 2,958 31,777
Balance at end of period $ 60,144 $ 112,117 $ 60,144 $ 112,117