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Acquisitions (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Business Acquisition [Line Items]      
Payments to Acquire Businesses, Gross $ 6,030 $ 441 $ 0
Finite-Lived Customer Relationships, Gross $ 733 0  
Finite-Lived Intangible Asset, Useful Life 5 years    
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability $ 412 0  
Mattic [Member]      
Business Acquisition [Line Items]      
Payments to Acquire Businesses, Gross 3,454    
Business Combination, Contingent Consideration, Liability 298    
Feeney [Member]      
Business Acquisition [Line Items]      
Payments to Acquire Businesses, Gross 1,326    
Business Combination, Contingent Consideration, Liability 84    
Perfect Products [Member]      
Business Acquisition [Line Items]      
Payments to Acquire Businesses, Gross 1,250    
Business Combination, Contingent Consideration, Liability $ 30    
West Coast [Member]      
Business Acquisition [Line Items]      
Payments to Acquire Businesses, Gross   $ 441