Intangibles and Other Assets, net (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization, Deferred Finance Costs	$ 2,463	$ 2,178
Intangible Assets, Net (Excluding Goodwill)	56,986	60,606
Deferred Finance Costs, Net	1,388	1,673
Long-term Investments and Receivables, Net	6,724	7,013
Other Assets, Miscellaneous	3,289	4,244
Other Assets	11,401	12,930
Other Assets, Noncurrent	68,387	73,536
Developed Technology and Application Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	23,371	21,894
Intangible Assets, Net (Excluding Goodwill)	22,904	24,381
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	14,433	13,054
Intangible Assets, Net (Excluding Goodwill)	$ 24,379	25,758
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	$ 8,258	7,573
Intangible Assets, Net (Excluding Goodwill)	9,403	10,088
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	1,033	954
Intangible Assets, Net (Excluding Goodwill)	$ 300	$ 379
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