Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended	1 Months Ended
	May 06, 2013 Suit	Nov. 30, 2012	Jul. 31, 2012 claim	Jun. 30, 2013	Dec. 31, 2012
Commitments and Contingencies (Textual) [Abstract]
Contingent consideration				$ 68.9	$ 20.0
Accrued expenses				5.3
Other long term liabilities				63.6
Number of putative class action suits filed	5
Recovery of compensatory damages		$ 20
Number of claims included in post-payment audit			183