Commitments and Contingencies (Details Textuals) (USD $)	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Commitments And Contingencies Line Items [Abstract]
Liability related to indemnifications	$ 7,700,000
Pretax cat loss after reinsurance	$ 26,600,000	$ 12,300,000
Longest Indemnification Expiration Date	2025