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Acquisitions - Fair Values of Assets Acquired and Liabilities Assumed at Date of Closing - Met- Pro Corporation (Parenthetical) (Detail) (USD $) | 9 Months Ended |
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Sep. 30, 2014 | Dec. 31, 2013
Business Combinations [Abstract] |  |
Proceeds from sale of assets held for sale | $ 6,600,000 |
Proceeds from sale of assets held for sale, closing balance | $ 4,210,000 | $ 11,083,000

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- Definition Amount classified as assets attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e1107-107759 + Details
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- Details
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