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Goodwill and Other Intangible Assets - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]      
Amortization of intangible assets $ 5,198 $ 2,198 $ 2,185