Reinsurance (Narrative) (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
Reinsurance Disclosures [Abstract]
Percentage of ceded earned premiums to gross earned premiums	19.00%	18.00%	19.00%	16.00%
Reinsurance recoverables	$ 141.3	$ 86.2	$ 238.9	$ 81.9