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Acquisition (Details)
 12 Months Ended
Apr. 01, 2015
USD ($)
payment
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Business Acquisition [Line Items]        
Goodwill   $ 25,210,000 $ 14,163,000  
Amortization of intangible assets   1,800,000 $ 700,000 $ 800,000
Timco Services, Inc.        
Business Acquisition [Line Items]        
Cash payments to acquire business $ 81,000,000      
Tax reimbursement payment 8,000,000      
Contingent consideration, maximum $ 20,000,000      
Number of contingent payments | payment 2      
Amount of contingent payments $ 10,000,000      
Contingent consideration, liability   7,000    
Goodwill 4,900,000      
Finite-lived intangible assets acquired $ 7,900,000      
Amortization of intangible assets   $ 1,400,000