Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets, Gross [Abstract]
Customer Lists And Rights To Sell	$ 772,747	$ 792,362
Trademarks, Formulations And Product Technology	155,416	157,049
Other Finite-Lived Intangible Assets, Gross	6,274	6,261
Total	934,437	955,672
Finite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	89,334	77,007
Customer Lists And Rights To Sell [Member]
Finite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	60,610	49,932
Trademarks Formulations and Product Technology [Member]
Finite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	23,075	21,299
Other Intangible Assets [Member]
Finite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	$ 5,649	$ 5,776