Reinsurance (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012 Maximum [Member] Florida Hurricane Catastrophe Fund [Member] Mandatory Layer [Member]	Jun. 01, 2012 Catastrophe [Member]	Jun. 30, 2012 Catastrophe [Member] Unaffiliated Private Reinsurers [Member] Below Mandatory Layer [Member]	Jun. 30, 2012 Catastrophe [Member] Florida Hurricane Catastrophe Fund [Member]	Jun. 30, 2012 Catastrophe [Member] Maximum [Member] Excess-of-Loss of Private and FHCF Coverage [Member]	Jun. 30, 2012 Catastrophe [Member] Maximum [Member] Unaffiliated Private Reinsurers [Member] Below Mandatory Layer [Member]	Jun. 30, 2012 Property Business [Member]	Jun. 30, 2012 Property Business [Member] Maximum [Member]
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Reinsurance, Number of Contracts						6
Reinsurance Coverage of Aggregate Value of Property Covered Under Contracts					90.00%
Reinsurance, Aggregate Value of Property Covered Under Contracts								$ 392,334,000
Aggregate Coverage for Covered Losses Under Reinsurance Contract					353,101,000				45,886,000	138,332,000		3,400,000
Reimbursement Rate of Eligible Loss Adjustment Expenses Included in Retention	5.00%		5.00%
Reinsurance, Losses Not Covered Prior to Coverage Beginning							15,000,000.000	153,332,000
Aggregate Coverage for Covered Losses Under Reinsurance Contract, Excess Coverage Per Million Dollars of Risk												1,700,000
Reinsurance Agreement, Threshold For Excess Loss Coverage											1,000,000
Resinstatement of Full Coverage In the Event of Exhausted Coverage Due to Loss Recoveries, Percent Additional Premium											50.00%
Aggregate Coverage for Covered Losses Under Reinsurance Contract, Excess Coverage Per Million Dollar Occurrence												2,200,000
Insurance Commissions and Fees, Flood Program	144,000	112,000	241,000	193,000
Reinsurance Costs and Recoveries, Net	$ 838,000	$ 5,407,000	$ 1,563,000	$ 6,579,000