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Selected Quarterly Financial Information (unaudited) - Impairments (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2014
Mar. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Synos Acquisition          
Asset impairment     $ 126 $ 58,170 $ 1,220
Change in contingent consideration       (29,368) 829
ALD          
Synos Acquisition          
Asset impairment $ 53,900        
Change in contingent consideration   $ (29,400)   $ (29,400) $ 800