Business Acquisitions - Table (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Finite-Lived Customer Lists, Gross	$ 68,456	$ 63,502
Finite-Lived Trademarks, Gross	23,834	18,944
Other Finite-Lived Intangible Assets, Gross	6,850	6,647
Goodwill	78,412	$ 77,933
Verkol [Member]
Business Acquisition [Line Items]
Current Assets	30,907
Property, Plant & Equipment	7,873
Finite-Lived Customer Lists, Gross	6,146
Finite-Lived Trademarks, Gross	5,378
Other Finite-Lived Intangible Assets, Gross	219
Goodwill	3,861
Other Long-term Assets	146
Total Assets Purchased	54,530
Other Current Liabilities	(7,349)
Long-Term Debt	(2,400)
Other Non-current Liabilities	(4,772)
Total Liabilities Assumed	(14,521)
Business Acquisition, Cost of Acquired Entity, Purchase Price	40,009
2014 Acquisitions [Member]
Business Acquisition [Line Items]
Current Assets	12,413
Property, Plant & Equipment	4,158
Finite-Lived Customer Lists, Gross	30,924
Finite-Lived Trademarks, Gross	12,606
Other Finite-Lived Intangible Assets, Gross	1,127
Goodwill	21,546
Other Long-term Assets	198
Total Assets Purchased	82,972
Other Current Liabilities	(4,562)
Other Non-current Liabilities	(4,374)
Total Liabilities Assumed	(8,936)
Business Acquisition, Cost of Acquired Entity, Purchase Price	$ 74,036