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Business Acquisitions (Details) - USD ($)
1 Months Ended
Feb. 28, 2017
Sep. 30, 2017
Dec. 31, 2016
Oct. 31, 2016
Business Acquisition [Line Items]        
Goodwill   $ 22,824,000 $ 13,823,000  
Cost & Compliance Associates [Member]        
Business Acquisition [Line Items]        
Business combination, consideration, cash portion $ 10,000,000      
Business combination, contingent consideration term 2 years      
Business combination, maximum consideration to be transferred $ 18,000,000.0      
Goodwill 8,801,000      
Business combination, goodwill expected to be deductible for tax purposes 0      
Deferred tax assets, goodwill $ 0      
Lavante [Member]        
Business Acquisition [Line Items]        
Goodwill       $ 2,286,000
Business combination, goodwill expected to be deductible for tax purposes       0
Deferred tax assets, goodwill       0
Business combination, net assets recognized       $ 3,800,000