Significant Transactions (WM Solutions) (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended		0 Months Ended	1 Months Ended
	Dec. 31, 2011 Old Lyme	Dec. 30, 2011 Old Lyme	Dec. 03, 2012 Central National	Feb. 28, 2010 Central National	Feb. 26, 2010 Central National
Business Acquisition [Line Items]
Cash to be paid on acquisition		$ 6.0			$ 5.0
Cash purchase price of note		2.1
Gain recognized	$ 7.2		$ 14.5	$ 12.8