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Insurance Operations - Change in Liability for Unpaid Losses and LAE (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Insurance [Abstract]        
Balance at beginning of period $ 112,117 $ 144,625 $ 134,353 $ 159,222
Less: Reinsurance recoverable (31,777) (58,705) (47,350) (68,584)
Net balance at beginning of period 80,340 85,920 87,003 90,638
Incurred (recovered) related to current year 54,014 32,637 127,211 87,825
Incurred (recovered) related to prior years (160) 1,544 (63) 860
Total incurred 53,854 34,181 127,148 88,685
Paid related to Current year 41,818 24,365 72,438 44,432
Paid related to Prior years 10,777 8,160 60,114 47,315
Total paid 52,595 32,525 132,552 91,747
Net balance at end of period 81,599 87,576 81,599 87,576
Plus: Reinsurance recoverable 19,460 49,339 19,460 49,339
Balance at end of period $ 101,059 $ 136,915 $ 101,059 $ 136,915