Business Acquisitions (Schedule of Purchase Price) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2012	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Total purchase price		$ 0	$ 0	$ 198,860
Business Acquisition, Acquiree - Duarte Business [Member]
Cash paid to seller	$ 198,900
Less cash acquired	(40)
Total purchase price	$ 198,860