Intangibles and Other Assets, net (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization, Debt Issuance Costs	$ 3,580	$ 3,473
Intangible Assets, Net (Excluding Goodwill)	44,378	46,151
Deferred Tax Assets, Net, Noncurrent	18,432	18,432
Debt Issuance Costs, Net	2,043	2,150
Long-term Investments and Receivables, Net	0	997
Other Assets, Miscellaneous	2,137	2,081
Other Assets	22,612	23,660
Other Assets, Noncurrent	66,990	69,811
Developed Technology and Application Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	28,513	27,778
Intangible Assets, Net (Excluding Goodwill)	17,762	18,497
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	19,259	18,569
Intangible Assets, Net (Excluding Goodwill)	$ 19,553	20,243
Customer Relationships [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Useful Life	7 years
Customer Relationships [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Useful Life	20 years
Trade Names and License Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	$ 10,657	10,315
Intangible Assets, Net (Excluding Goodwill)	7,004	7,346
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	1,274	1,268
Intangible Assets, Net (Excluding Goodwill)	$ 59	$ 65
Noncompete Agreements [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Useful Life	3 years
Noncompete Agreements [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Useful Life	10 years
Developed Technology Rights [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Useful Life	5 years
Developed Technology Rights [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Useful Life	15 years
Trade Names [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Useful Life	5 years
Trade Names [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Useful Life	20 years