Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Mar. 31, 2018		Mar. 31, 2017	Mar. 31, 2018		Mar. 31, 2017	Jun. 30, 2017
Accounting Policies [Abstract]
Accrued workers compensation - noncurrent	$ 12,500			$ 12,500			$ 8,500
Tax Cuts And Jobs Act of 2017, Reclassification from accumulated other comprehensive loss to retained earnings	$ 1,889	[1]	$ 0	$ 1,889	[1]	$ 0

[1] See further discussion of this reclassification under the caption “Recently Adopted Accounting Standards” within Note 1.