Goodwill and Other Intangible Assets Schedule of Finite-Lived Intangible Assets, Amortization Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Amortization of Intangible Assets [Line Items]
Amortization of intangible assets	$ 5,000	$ 5,090	$ 9,990	$ 10,190
Cost of Sales [Member] | Technology and Other [Member]
Amortization of Intangible Assets [Line Items]
Amortization of intangible assets	1,360	1,390	2,710	2,770
Selling, General and Administrative Expenses [Member] | Customer Relationships [Member]
Amortization of Intangible Assets [Line Items]
Amortization of intangible assets	$ 3,640	$ 3,700	$ 7,280	$ 7,420