Segment Information (Long-lived Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Jun. 30, 2017
Segment Reporting Information [Line Items]
Long-lived assets	$ 440,420	$ 423,074
United States [Member]
Segment Reporting Information [Line Items]
Long-lived assets	187,960	194,348
United Kingdom [Member]
Segment Reporting Information [Line Items]
Long-lived assets	173,299	165,396
All Other [Member]
Segment Reporting Information [Line Items]
Long-lived assets	$ 79,161	$ 63,330