Operating Segments (Reconciliation Of Reportable Segments Measure Of Profit Or Loss To Income) (Details) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
		Mar. 31, 2019	Mar. 31, 2018		Mar. 31, 2019	Mar. 31, 2018
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating (loss) income	[1]	$ (21,683)	$ 7,564	[2]	$ (63,862)	$ 48,877	[2]
Change in value of equity securities	[1]	(26,263)	37,843	[2]	(42,099)	37,843	[2]
Loss on disposal of DNI		(5,140)			(5,140)	463	[3]
Interest income, net of impairment	[1]	(959)	5,154	[2]	586	14,903	[2]
Interest expense	[1]	(3,493)	(2,426)	[2]	(9,030)	(6,872)	[2]
(Loss) Income before income taxes	[1]	(57,538)	48,135	[2]	(119,545)	94,751	[2]
Reportable Segment [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating (loss) income		(7,818)	12,795		(31,678)	65,579
Corporate/Eliminations [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating (loss) income		$ (13,865)	$ (5,231)		$ (32,184)	$ (16,702)

[1] Refer to Note 2 for discontinued operations disclosures.

[2] Refer to Note 1

[3] Refer to Note 1.