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Business Acquisitions (Details) | 3 Months Ended |  |  |
--- | --- | --- | --- | ---
Mar. 31, 2015 USD ($) acquisitions | Mar. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | May. 18, 2015 USD ($)
Business Acquisition [Line Items] |  |  |  |
Number of business acquisitions | acquisitions | 0 |  |  |
Goodwill | $ 72,365,000 | $ 63,934,000 | $ 63,934,000 |
Kay Flow Industries, Inc. |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Percentage of shares outstanding acquired |  |  |  | 100.00%
Contingent consideration, minimum |  |  |  | $ 0
Contingent consideration, maximum |  |  |  | 24,000,000
Fair value of consideration for acquisition |  |  |  | 129,429,000
Contingent consideration |  |  |  | 400,000
Goodwill |  |  |  | $ 47,735,000

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