Anchen Acquisition (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended					0 Months Ended	3 Months Ended
	Dec. 31, 2011	Dec. 31, 2011 Investment Bank Fees [Member]	Dec. 31, 2011 Accounting Fees [Member]	Dec. 31, 2011 Legal Fees [Member]	Dec. 31, 2011 Other Fees [Member]	Nov. 17, 2011 Anchen Acquisition [Member]	Jun. 30, 2012 Anchen Acquisition [Member]
Business Acquisition [Line Items]
Purchase price						$ 412,753
Acquisition post-closing adjustment, amounts collected from Anchen securityholders							3,786
Transaction costs	$ 8,264	$ 5,013	$ 1,628	$ 1,348	$ 275