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, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income	$ 7,564	$ 24,547	$ 48,877	$ 82,317
Interest income	5,154	5,124	14,903	14,489
Interest expense	(2,426)	(467)	(6,872)	(1,773)
Income before income taxes	10,292	29,204	56,908	95,033
Reportable Segment [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income	12,795	31,563	65,579	99,494
Corporate/Eliminations [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income	$ (5,231)	$ (7,016)	$ (16,702)	$ (17,177)