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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