Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Income and Comprehensive Income [Abstract]
Net income (loss)	$ 214,163	$ (12,780)	$ (499,174)	$ 208,682
Other comprehensive income (loss):
Net change in foreign currency translation adjustments	6,712	5,223	(20,126)	(3,392)
Other	(133)	(87)	3,166	(503)
Total other comprehensive income (loss)	6,579	5,136	(16,960)	(3,895)
Total comprehensive income (loss)	$ 220,742	$ (7,644)	$ (516,134)	$ 204,787