Segment Information (Long-lived Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Long-lived assets	$ 367,675	$ 341,099
United States [Member]
Segment Reporting Information [Line Items]
Long-lived assets	102,744	112,373
United Kingdom [Member]
Segment Reporting Information [Line Items]
Long-lived assets	178,797	165,396
All Other [Member]
Segment Reporting Information [Line Items]
Long-lived assets	$ 86,134	$ 63,330