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Divestitures and Acquisitions - Acquisitions (Details) - USD ($)
$ in Thousands
12 Months Ended
Jul. 30, 2014
Dec. 31, 2016
Dec. 31, 2015
Acquisitions      
Cash consideration $ 22,500    
Goodwill   $ 10,102 $ 11,933
IDS Member      
Acquisitions      
Percentage of ownership acquired 100.00%    
Contingent payment $ 4,800   0
Cash consideration 22,499    
Total purchase price 22,499    
Cash 4,206    
Accounts receivable, net 1,035    
Deferred Tax Liability (1,650)    
Goodwill 13,801    
Total purchase price 22,499    
Professional fees     $ 800
IDS Member | Trade name      
Acquisitions      
intangible asset 160    
IDS Member | Customer related intangibles      
Acquisitions      
intangible asset 2,674    
Goodwill and intangible assets amortization period   15 years  
IDS Member | Computer software      
Acquisitions      
intangible asset $ 2,273    
Goodwill and intangible assets amortization period   5 years