Goodwill and Intangible Assets - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2018	Jun. 30, 2018
ASCO Customer Relationships
Goodwill And Intangible Assets [Line Items]
Finite-Lived Assets, Weighted Average Amortization Period	10 years	15 years
Goodwill
Goodwill And Intangible Assets [Line Items]
Increase (decrease) in fair value of identifiable intangible assets and goodwill	$ 1.4
Finite-Lived Intangible Assets
Goodwill And Intangible Assets [Line Items]
Increase (decrease) in fair value of identifiable intangible assets and goodwill	$ (1.4)