Other Reinsurance Ceded Insurance (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Effects of Reinsurance [Line Items]
Ceded to Other Companies	$ 33.9	$ 42.5	$ 40.7
Assumed Premiums Earned	52.7	44.0	43.7
Non-Catastrophe Reinsurance [Member]
Effects of Reinsurance [Line Items]
Ceded to Other Companies	33.9	42.5	40.7
Assumed Premiums Earned	$ 52.7	$ 44.0	$ 43.7