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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, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Insurance [Abstract]        
Balance at beginning of period $ 125,161 $ 150,557 $ 134,353 $ 159,222
Less: Reinsurance recoverable (42,713) (64,109) (47,350) (68,584)
Net balance at beginning of period 82,448 86,448 87,003 90,638
Incurred (recovered) related to current year 39,637 28,333 73,200 55,188
Incurred (recovered) related to prior years 67 (654) 94 (684)
Total incurred 39,704 27,679 73,294 54,504
Paid related to Current year 23,830 16,200 30,623 20,067
Paid related to Prior years 17,982 12,007 49,334 39,155
Total paid 41,812 28,207 79,957 59,222
Net balance at end of period 80,340 85,920 80,340 85,920
Plus: Reinsurance recoverable 31,777 58,705 31,777 58,705
Balance at end of period $ 112,117 $ 144,625 $ 112,117 $ 144,625