Business Segment, Geographic and Major Customer Information - Additional Disclosures (Details) - segment	3 Months Ended
Mar. 31, 2016	Mar. 31, 2015
Segment Reporting Information [Line Items]
Number of reportable segments	4
Customer Concentration Risk [Member] \| Customer A [Member] \| Sales [Member]
Segment Reporting Information [Line Items]
Percentage of revenue by major customers (percent)	21.10%	12.00%
Customer Concentration Risk [Member] \| Customer B [Member] \| Sales [Member]
Segment Reporting Information [Line Items]
Percentage of revenue by major customers (percent)	10.90%	10.30%
Customer Concentration Risk [Member] \| Major Customers [Member] \| Sales [Member] \| Energy Chemistry Technologies [Member] \| Minimum [Member]
Segment Reporting Information [Line Items]
Percentage of revenue by major customers (percent)	94.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13531-108611

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6404-108592

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13537-108611

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration