Insurance Operations - Beginning and Ending Balances and Changes in DPAC, Net of DRCC (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Insurance [Abstract]
DPAC, beginning of period	$ 58,149	$ 59,033	$ 54,099	$ 54,431
Capitalized Costs	27,579	26,382	84,354	85,315
Amortization of DPAC	(27,769)	(27,888)	(80,494)	(82,219)
DPAC, end of period	57,959	57,527	57,959	57,527
DRCC, beginning of period	30,072	41,792	38,200	37,149
Ceding Commissions Written	17,236	21,319	49,555	69,853
Earned Ceding Commissions	(17,181)	(22,537)	(57,628)	(66,428)
DRCC, end of period	30,127	40,574	30,127	40,574
DPAC (DRCC), net, beginning of period	28,077	17,241	15,899	17,282
Capitalized Costs, net	10,343	5,063	34,799	15,462
Amortization of DPAC (DRCC), net	(10,588)	(5,351)	(22,866)	(15,791)
DPAC (DRCC), net, end of period	$ 27,832	$ 16,953	$ 27,832	$ 16,953