Basis of Presentation - Revision of Consolidated Statements of Cash flows (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Consolidated Statement Of Cash flow
Net income (loss)	$ 8,478	$ 35,907
Inventories	10,024	41,311
Deferred income taxes	819	(256)
Net cash provided by operating activities	64,629	133,070
Accrued expenses and other liabilities	(56,537)	(16,813)
As Reported
Consolidated Statement Of Cash flow
Net income (loss)	3,798	38,191
Inventories	10,024	37,604
Deferred income taxes	5,499	(256)
Net cash provided by operating activities	64,629	133,070
Accrued expenses and other liabilities	(56,537)	(15,390)
Adjustment
Consolidated Statement Of Cash flow
Net income (loss)	4,680	(2,284)
Inventories		3,707
Deferred income taxes	$ (4,680)
Accrued expenses and other liabilities		$ (1,423)