Business Acquisition (Schedule of the Purchase Price) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2018
Business Acquisition [Line Items]
Total purchase price		$ 771,115
Business Acquisition, Acquiree - L'Orange [Member]
Business Acquisition [Line Items]
Cash paid to Sellers	$ 780,401
Less acquired cash and restricted cash	(9,286)
Total purchase price	$ 771,115