Unpaid losses and LAE (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Unpaid losses and LAE [Abstract]
Unpaid losses and LAE, period start	$ 49,908	$ 59,983
Less reinsurance recoverables	(3,503)	(2,088)
Unpaid Losses and LAE, net, period start	46,405	57,895
Incurred related to Unpaid losses and LAE [Abstract]
Current year	10,126	31,636
Prior years	(805)	(1,427)
Total incurred losses and LAE	9,321	30,209
Paid Related To Unpaid Losses And LAE [Abstract]
Current year	1,867	15,892
Prior years	9,880	25,807
Total paid	11,747	41,699
Unpaid Losses and LAE, net, period end	43,979	46,405
Plus reinsurance recoverables	3,586	3,503
Unpaid losses and LAE, period end	$ 47,565	$ 49,908