Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets, Gross [Abstract]
Finite-Lived Customer Lists, Gross	$ 33,543	$ 32,356
Finite-Lived Trademarks, Gross	6,785	6,760
Formulations And Product Technology	5,808	5,278
Other Finite-Lived Intangible Assets, Gross	5,541	5,467
Total	51,677	49,861
Finite Lived Intangible Assets Accumulated Amortization [Abstract]
Finite Lived Intangible Assets Accumulated Amortization Customer Lists	9,733	8,192
Finite Lived Intangible Assets Accumulated Amortization Trademarks	3,029	2,548
Finite Lived Intangible Assets Accumulated Amortization Formulations	3,655	3,423
Finite Lived Intangible Assets Accumulated Amortization Other	4,332	3,989
Total	20,749	18,152
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
For the year ended December 31, 2013	3,445
For the year ended December 31, 2014	3,253
For the year ended December 31, 2015	3,253
For the year ended December 31, 2016	2,774
For the year ended December 31, 2017	2,110
For the year ended December 31, 2018	2,087
Indefinite-Lived Intangible Assets (Excluding Goodwill) [Abstract]
Indefinite-Lived Trademarks	$ 1,100	$ 1,100