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Goodwill and Other Intangible Assets - Carrying Amount of Goodwill (Details)
$ in Thousands
6 Months Ended
Dec. 31, 2017
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill, Acquired During Period $ 19,791
Goodwill [Roll Forward]  
Goodwill as of June 30, 2017 12,692
Effect of foreign currency changes on goodwill 108
Goodwill as of December 31, 2017 $ 32,591