Deferred Acquisition Costs (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Deferred Policy Acquisition Costs Disclosures [Abstract]
Deferred Policy Acquisition Costs, Additions	$ 38,431	$ 29,744
Deferred Policy Acquisition Costs [Roll Forward]
Deferred policy acquisition costs, beg. balance	12,324	9,342
Amortization	(33,777)	(26,762)
Deferred policy acquisition costs, end. balance	$ 16,978	$ 12,324