Reinsurance - Reinssurance Agreements (Details) (USD $)	12 Months Ended		24 Months Ended	72 Months Ended
	Dec. 31, 2004	Dec. 31, 2003	Dec. 31, 2012	Dec. 31, 2010
Platinum Underwriters Reinsurance, Inc
A.M. Best Rating	A	A	A	A
Retention	$ 250,000	$ 250,000	$ 500,000	$ 300,000
Annual Aggregate Deductible	500,000	500,000		500,000
Hannover Ruckversicherungs AG
A.M. Best Rating	A	A	A	A
Retention	250,000	250,000	500,000	300,000
Annual Aggregate Deductible	500,000	500,000		500,000
TOA Reinsurance
A.M. Best Rating			A+
Retention			500,000
Annual Aggregate Deductible
QBE Reinsurance Corporation
A.M. Best Rating		A
Retention		250,000
Annual Aggregate Deductible		$ 500,000