Acquisitions - Silarx Pharmaceuticals (Details) - USD ($) $ in Thousands	Jun. 01, 2015	Dec. 31, 2015	Jun. 30, 2015
Purchase price allocation of the assets acquired and liabilities assumed
Goodwill		$ 240,716	$ 141
Silarx
Acquisitions
Percentage of outstanding equity interest	100.00%
Total cash consideration	$ 42,500
Purchase price allocation of the assets acquired and liabilities assumed
Cash	664
Accounts receivable, net of revenue-related reserves	4,396
Inventories	2,705
Other current assets	467
Property, plant and equipment	7,247
Product Rights	10,000
In-process research and development	18,000
Goodwill	141
Other assets	9
Total assets acquired	43,629
Accounts payable	(711)
Income taxes payable	(392)
Total net assets acquired	$ 42,526
Estimated useful lives	15 years