Fair Value Measurements (Details Textual) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Cash and Cash Equivalents [Line Items]
Accrued expenses	$ 5.3
Other long term liabilities	63.6
Fair Value Measurement (Textual) [Abstract]
Increase in discount rates related to consideration	1.00%
Change in contingent consideration on discount rates increase	1.3
Decrease of estimated future sales in amount	0.5
Decrease of estimated future sales	10.00%
Contingent consideration	68.9	20.0
Maximum [Member]
Cash and Cash Equivalents [Line Items]
Discount rates related to consideration	27.00%
Minimum [Member]
Cash and Cash Equivalents [Line Items]
Discount rates related to consideration	6.00%
US Treasury Securities [Member]
Cash and Cash Equivalents [Line Items]
Accrued expenses	5.3	5.1
Other long term liabilities	63.6	14.9
September 5, 2013 [Member]
Cash and Cash Equivalents [Line Items]
US Government Securities, at Carrying Value	25.0
September 30, 2015 [Member]
Cash and Cash Equivalents [Line Items]
US Government Securities, at Carrying Value	25.0
October 15, 2013 [Member]
Cash and Cash Equivalents [Line Items]
US Government Securities, at Carrying Value	$ 25.0