Fair Value Measurements (Level 3 Contingent Purchase Price) (Details) (USD $) In Thousands, unless otherwise specified			3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 3 [Member]	Jun. 30, 2012 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 3 [Member]	Jun. 30, 2013 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 3 [Member]	Jun. 30, 2012 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 3 [Member]	Jun. 30, 2013 Incline Therapeutics, Inc. [Member] Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 3 [Member]	Jun. 30, 2012 Incline Therapeutics, Inc. [Member] Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 3 [Member]	Jun. 30, 2013 Incline Therapeutics, Inc. [Member] Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 3 [Member]	Jun. 30, 2012 Incline Therapeutics, Inc. [Member] Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 3 [Member]	Jun. 30, 2013 Targanta [Member]	Dec. 31, 2012 Targanta [Member]
Fair Value Measurment, Contingent Purchase Price [Roll Forward]
Balance at beginning of period	$ 100,524	$ 18,971	$ 105,807	$ 20,995	$ 18,971	$ 20,431					$ 5,424	$ 18,971
Contingent purchase price value of Incline as of January 4, 2013							0	0	87,200	0
Fair value adjustment to contingent purchase price included in net income			(5,283)	573	(5,647)	1,137
Balance at end of period	$ 100,524	$ 18,971	$ 100,524	$ 21,568	$ 100,524	$ 21,568					$ 5,424	$ 18,971