License And Other arrangements (Details) (USD $)	3 Months Ended		6 Months Ended		1 Months Ended	3 Months Ended		6 Months Ended		3 Months Ended	6 Months Ended	1 Months Ended			3 Months Ended	1 Months Ended	3 Months Ended			6 Months Ended		1 Months Ended	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Jul. 31, 2008 Santarus Inc. [Member]	Jun. 30, 2012 Santarus Inc. [Member]	Jun. 30, 2011 Santarus Inc. [Member]	Jun. 30, 2012 Santarus Inc. [Member]	Jun. 30, 2011 Santarus Inc. [Member]	Jun. 30, 2012 Ventiv Commercial Services, LLC [Member]	Jun. 30, 2012 Ventiv Commercial Services, LLC [Member]	Mar. 31, 2011 Abbott Products Inc. [Member]	Feb. 28, 2011 Abbott Products Inc. [Member]	Feb. 28, 2009 Abbott Products Inc. [Member]	Mar. 31, 2011 Abbott Products Inc. [Member]	Apr. 30, 2011 Boehringer Ingelheim International GMBH [Member]	Jun. 30, 2012 Boehringer Ingelheim International GMBH [Member]	Mar. 31, 2012 Boehringer Ingelheim International GMBH [Member]	Jun. 30, 2011 Boehringer Ingelheim International GMBH [Member]	Jun. 30, 2012 Boehringer Ingelheim International GMBH [Member]	Jun. 30, 2011 Boehringer Ingelheim International GMBH [Member]	Jul. 31, 2011 Ironwood Pharmaceuticals, Inc. [Member]	Jun. 30, 2012 Ironwood Pharmaceuticals, Inc. [Member]	Mar. 31, 2012 Ironwood Pharmaceuticals, Inc. [Member]	Jun. 30, 2012 Ironwood Pharmaceuticals, Inc. [Member]
Royalty receivable percentage, 2011								26.50%
Royalty receivable percentage, 2012								29.50%
Royalty receivable percentage, 2013 and 2014								32.00%
Royalty receivable percentage, 2015 and thereafter								34.50%
Royalties	$ 9,577,000	$ 67,000	$ 18,998,000	$ 232,000		$ 9,400,000		$ 18,600,000
Promotional fee paid, percentage of gross margin									75.00%
Promotion fee expense		11,055,000		21,317,000			11,100,000		21,300,000
License and other revenue	1,332,000	4,998,000	6,637,000	72,623,000		1,000,000	200,000	2,000,000	500,000										3,900,000		4,900,000		200,000		500,000
Gain on settlement agreement				40,000,000								40,000,000
Upfront agreement fee received					12,000,000									25,000,000		10,000,000						900,000
Upfront agreement fee deferred revenue balance								5,800,000							11,300,000
Collaborative agreement expense incurred										7,600,000	14,400,000
Milestone revenue received													48,000,000					2,500,000						1,000,000
Upfront agreement fee tax withholdings																1,500,000
Upfront agreement fee net of tax																8,500,000
Monthly management fee fulltime reps											1,800,000
Monthly management fee for part-time sales reps											500,000
Additional service agreement revenue																	$ 0		$ 500,000	$ 100,000	$ 600,000				$ 100,000
Number of full-time sales representatives											164
Number of part-time sales representatives											78
Percent of out-of-pocket costs reimbursed to company								70.00%
Percent of out-of-pocket costs reimbursed by company								30.00%