Segment Information (Long-lived Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Long-lived assets	$ 380,800	$ 360,564
United States [Member]
Segment Reporting Information [Line Items]
Long-lived assets	115,243	99,650
United Kingdom [Member]
Segment Reporting Information [Line Items]
Long-lived assets	179,226	174,214
All Other [Member]
Segment Reporting Information [Line Items]
Long-lived assets	$ 86,331	$ 86,700