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Business Combinations (Details) - USD ($)
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 16, 2016
Business Combination, Separately Recognized Transactions [Line Items]      
Manchester Industries Acquisition purchase price true-up to taxes and goodwill $ 100,000    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets     $ 22,046,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment     6,967,000
Goodwill, Acquired During Period   $ 35,074,000  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles     25,472,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets     89,559,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities     5,403,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent     12,491,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities     17,894,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net     71,665,000
Business Combination, Contingent Consideration, Liability     4,200,000
Business Combination, Consideration Transferred   71,700,000  
Cash purchase price     $ 67,500,000
Business Combination, Consideration Transferred, Other   700,000  
Business Acquisition, Transaction Costs $ 200,000 $ 2,700,000