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Goodwill and Intangible Assets - Goodwill (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Goodwill      
Gross carrying amount, beginning balance $ 238,158 $ 186,589  
Accumulated impairment, beginning balance 123,199 95,241  
Net amount, beginning balance 114,959 91,348  
Acquisition   51,396  
Purchase price adjustments (51) 173  
Impairments   27,958  
Gross carrying amount, ending balance 238,107 238,158 $ 186,589
Accumulated impairment, ending balance 123,199 123,199 95,241
Net amount, ending balance 114,908 114,959 91,348
Impairments      
Asset impairment $ 126 58,170 $ 1,220
Certain tangible assets      
Impairments      
Asset impairment   3,600  
Goodwill      
Goodwill      
Impairments   28,000  
Other long-lived assets      
Impairments      
Asset impairment   25,900  
Other long-lived assets | Customer relationship      
Impairments      
Asset impairment   17,400  
Other long-lived assets | IPR&D      
Impairments      
Asset impairment   $ 4,800