Commitments and Contingencies (Details) (USD $)	9 Months Ended					0 Months Ended	1 Months Ended	3 Months Ended				1 Months Ended		9 Months Ended	1 Months Ended			12 Months Ended					0 Months Ended		1 Months Ended	5 Months Ended	31 Months Ended			0 Months Ended													1 Months Ended		9 Months Ended
	Sep. 30, 2013 Waterlink's Columbus, Ohio property	Sep. 30, 2012 Waterlink's Columbus, Ohio property	Sep. 30, 2013 Waterlink's Columbus, Ohio property Accounts payable and accrued liabilities	Sep. 30, 2013 Waterlink's Columbus, Ohio property Accrued pension and other liabilities	Dec. 31, 2012 Waterlink's Columbus, Ohio property Accrued pension and other liabilities	Apr. 11, 2012 Big Sandy Plant	Sep. 30, 2013 Big Sandy Plant Item	Sep. 30, 2013 Big Sandy Plant	Jun. 30, 2012 Big Sandy Plant	Nov. 30, 2012 Big Sandy Plant	Dec. 31, 2010 Big Sandy Plant	Mar. 31, 2013 Frontier Chemical Processing Royal Avenue Site Item	Aug. 31, 2008 Frontier Chemical Processing Royal Avenue Site Item	Sep. 30, 2013 Frontier Chemical Processing Royal Avenue Site	Dec. 31, 2012 Continued Dumping and Subsidy Offset Act Distributions	Nov. 30, 2009 Continued Dumping and Subsidy Offset Act Distributions	Dec. 31, 2008 Continued Dumping and Subsidy Offset Act Distributions	Dec. 31, 2012 Continued Dumping and Subsidy Offset Act Distributions	Dec. 31, 2011 Continued Dumping and Subsidy Offset Act Distributions	Dec. 31, 2010 Continued Dumping and Subsidy Offset Act Distributions	Sep. 30, 2013 Continued Dumping and Subsidy Offset Act Distributions	May 31, 2013 Continued Dumping and Subsidy Offset Act Distributions	Nov. 10, 2009 Period of Review I	Apr. 08, 2007 Period of Review I	Mar. 29, 2007 Period of Review I	Mar. 02, 2007 Period of Review I	Nov. 09, 2009 Period of Review I	Dec. 31, 2012 Period of Review I	Dec. 17, 2009 Period of Review I	Nov. 17, 2010 Period of Review II	Aug. 15, 2013 Period of Review III Item	Oct. 31, 2011 Period of Review III	Nov. 09, 2012 Period of Review IV	Nov. 09, 2012 Period of Review IV Minimum	Nov. 09, 2012 Period of Review IV Maximum	May 03, 2013 Period of Review V	Jul. 11, 2012 Period of Review V Item	May 03, 2013 Period of Review V Minimum	May 03, 2013 Period of Review V Maximum	Jun. 26, 2013 Period of Review VI Item	Dec. 18, 2012 Sunset Review Item	Jun. 06, 2012 Sunset Review	Mar. 18, 2013 Sunset Review	Mar. 31, 2012 Sunset Review Item	Sep. 30, 2013 Carbon Imports - Anti-dumping duties	Mar. 02, 2007 Carbon Imports - Anti-dumping duties Minimum	Mar. 02, 2007 Carbon Imports - Anti-dumping duties Maximum
Contingencies
Recorded liability estimates for environmental loss contingencies			$ 500,000	$ 400,000	$ 1,400,000
Published anti-dumping tariff rate (as a percent)																																														61.95%	228.11%
Prior period over which Commerce Department reviews anti-dumping tariffs																																													12 months
Period for which reviews are possible																																													5 years
Anti-dumping duty deposit rate (as a percent)																								69.54%	78.89%	84.45%	69.54%			14.51%
Adjusted Ongoing Anti-dumping duty rate determined by review (as a percent)																							14.51%									0.00%	0.00%
Rate of adjustment for certain ministerial errors (as a percent)																													0.07%
Assessment rate (as a percent)																							31.93%
Receivable recorded for anticipated refunds of anti-dumping duties																							1,600,000									1,100,000
Refunds received for tariff deposits made																												1,600,000
Tariff collection rate for cooperative respondents (in dollars per pound)																														0.127		0.127
Number of respondents applied with per-unit rates																															1
Assessment rate finalized at deposit rate due to not participating in review (as a percent)																																	14.51%
Number of mandatory respondents selected for review of anti-dumping tariffs																																					2
Number of U.S. producers besides the Company participating in sunset review																																									2			2
Number of mandatory respondents																																								2
Extension period for continuation of anti-dumping tariff																																										5 years	5 years	5 years
Period for possible continuation of anti-dumping tariff																																									5 years			5 years
Distributions received under Continued Dumping and Subsidy Offset Act																800,000	200,000		0	0
Distributions received as a percentage of total amount of duties available																59.57%	59.57%
Amount received															1,800,000
Amount received, reflected within the entity's consolidated statement of comprehensive income																		1,500,000
Preliminary amount identified for distribution related to certain activated carbon imported from China																						100,000
Percentage of final anti-dumping duties expected to be returned as CDSOA distributions																					59.57%
Accrued potential loss related to civil penalties											2,000,000
Reduction in previously recorded liabilities								(200,000)	(200,000)
Penalty amount							1,600,000	1,600,000		1,600,000
Penalties associated with characterization of the residues						0
Number of ground water monitoring wells to be installed							2
Environmental remediation costs	500,000	500,000						400,000
Amount available in trust account of PRP Group to fund remediation														7,500,000
Number of PRP's joining the Company in Consent Order for additional site investigation													100
Number of PRP's joining the Company in Consent Order for additional site investigation												30
Estimated remaining costs for completion of thermal treatment of soils														6,400,000
Cash on hand with PRP Group to pay for thermal treatment of soils														$ 5,300,000
Anti-dumping margins for mandatory respondents (in dollars per pound)																																		0.20	0.96	0.19		0.13	0.25
Anti-dumping margins for cooperative, separate rate respondents (in dollars per pound)																																	0.47
Anti-dumping margin for a competitor (in dollars per pound)																																	0