Business Acquisitions - Table (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Customer Lists And Rights To Sell	$ 75,844	$ 71,454
Trademarks, Formulations And Product Technology	31,684	31,436
Other Finite-Lived Intangible Assets, Gross	6,090	6,023
Goodwill	84,762	$ 80,804
2016 Acquisitions [Member]
Business Acquisition [Line Items]
Current Assets (includes cash acquired)	3,443
Property, Plant & Equipment	2,574
Customer Lists And Rights To Sell	5,041
Trademarks, Formulations And Product Technology	2,543
Other Finite-Lived Intangible Assets, Gross	127
Goodwill	3,355
Total Assets Purchased	17,083
Current Liabilities	(1,198)
Other Long-Term Liabilities	(2,019)
Total Liabilities Assumed	(3,217)
Business Acquisition, Cost of Acquired Entity, Purchase Price, Gross	13,866
Cash Acquired	105
Business Acquisition, Cost of Acquired Entity, Purchase Price	$ 13,761