Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2018	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Long-lived asset and intangibles impairment			$ 33,719	$ 14,033	$ 40,452
Weighted average remaining amortization period			9 years 5 months 5 days
Minimum
Segment Reporting Information [Line Items]
Finite-lived intangible asset, useful life			3 years
Maximum
Segment Reporting Information [Line Items]
Finite-lived intangible asset, useful life			25 years
United Kingdom
Segment Reporting Information [Line Items]
Long-lived asset and intangibles impairment					26,373
Trade Names
Segment Reporting Information [Line Items]
Long-lived asset and intangibles impairment	$ 17,900	$ 5,632	$ 17,900	5,632
Trade Names | United States
Segment Reporting Information [Line Items]
Long-lived asset and intangibles impairment			11,300		$ 6,500
Trade Names | Rest of World
Segment Reporting Information [Line Items]
Long-lived asset and intangibles impairment			3,813	5,100
Trade Names | United Kingdom
Segment Reporting Information [Line Items]
Long-lived asset and intangibles impairment			$ 2,787	$ 532