Goodwill and Other Intangible Assets - Carrying Value of Goodwill (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended							3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Energy Chemical Technologies [Member]	Sep. 30, 2014 Consumer and Industrial Chemical Technologies [Member]	Dec. 31, 2013 Consumer and Industrial Chemical Technologies [Member]	Sep. 30, 2014 Teledrift [Member]	Dec. 31, 2013 Teledrift [Member]	Sep. 30, 2014 Florida Chemical [Member]	Sep. 30, 2014 Florida Chemical [Member]	Sep. 30, 2014 Florida Chemical [Member] Energy Chemical Technologies [Member]	Sep. 30, 2014 Florida Chemical [Member] Consumer and Industrial Chemical Technologies [Member]	Sep. 30, 2014 Florida Chemical [Member] Teledrift [Member]	Sep. 30, 2014 EOGA [Member]	Sep. 30, 2014 EOGA [Member] Energy Chemical Technologies [Member]	Sep. 30, 2014 EOGA [Member] Consumer and Industrial Chemical Technologies [Member]	Sep. 30, 2014 EOGA [Member] Teledrift [Member]	Sep. 30, 2014 SiteLark [Member]	Sep. 30, 2014 SiteLark [Member] Energy Chemical Technologies [Member]	Sep. 30, 2014 SiteLark [Member] Consumer and Industrial Chemical Technologies [Member]	Sep. 30, 2014 SiteLark [Member] Teledrift [Member]
Goodwill [Roll Forward]
Balance at December 31, 2013	$ 66,271		$ 30,296	$ 19,480	$ 20,642	$ 15,333	$ 15,333
Final Florida Chemical acquisition adjustment	(1,162)	0						(1,200)	(1,162)	0	(1,162)	0
Addition upon acquisition			6,000										5,455	5,455	0	0	567	567	0	0
Balance at September 30, 2014	$ 71,131		$ 36,318	$ 19,480	$ 20,642	$ 15,333	$ 15,333