Accrued Liabilities (Changes in Loss Reserve Activity) (Details) - Loss Reserve On Contractual Lease Commitments [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Sep. 30, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring charges, beginning of period	$ 3,382	$ 4,478	$ 3,931	$ 5,270	$ 5,270
Payments, net of sublease income	(269)	(267)	(818)	(1,059)
Restructuring charges, end of period	$ 3,113	$ 4,211	$ 3,113	$ 4,211	$ 3,931