Acquisitions and Divestitures - Acquired Intangible Assets and Weighted Average Amortization Periods (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Amortized intangible assets	$ 188,877
Indefinite lived	28,800
Total acquired intangible assets	217,677
Trade Names
Acquired Finite-Lived Intangible Assets [Line Items]
Amortized intangible assets	$ 14,078
Weighted Average Life	15 years
Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Amortized intangible assets	$ 134,519
Weighted Average Life	13 years
Unpatented technology
Acquired Finite-Lived Intangible Assets [Line Items]
Amortized intangible assets	$ 40,280
Weighted Average Life	13 years