Business Acquisitions (Schedule of Purchase Price) (Details) $ in Thousands	12 Months Ended
	Sep. 30, 2018 USD ($)
Business Acquisition [Line Items]
Total purchase price	$ 771,115
Business Acquisition, Acquiree - L'Orange [Member]
Business Acquisition [Line Items]
Cash paid to seller	780,401
Less cash and restricted cash acquired	(9,286)
Total purchase price	$ 771,115