Summary of Significant Accounting Policies (Summary of Reinsurance Activity) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Accounting Policies [Abstract]
Net assumed written premiums	$ 10.9	$ 14.1	$ 25.6	$ 30.4
Net premiums earned	13.6	12.9	26.8	24.9
Provision for claims	11.0	10.5	22.0	19.5
Amortization of capitalized acquisition costs	$ 0.4	$ 0.3	$ 0.7	$ 0.6