Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock	Capital in Excess of Par	(Accumulated Deficit) Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Total
Increase (Decrease) in Shareholders' Equity
Revision (See Note 2) | Adjustment			$ 14,675	$ (1,117)	$ 13,558
Balance (As Reported) at Sep. 30, 2012		$ 1,554,883	168,943	(18,594)	1,705,232
Balance at Sep. 30, 2012		1,554,883	183,618	(19,711)	1,718,790
Balance (in shares) (As Reported) at Sep. 30, 2012	1
Balance (in shares) at Sep. 30, 2012	1
Increase (Decrease) in Shareholders' Equity
Net income (loss) | As Reported					129,480
Net income (loss) | Adjustment					7,430
Net income (loss)			136,910		136,910
Other comprehensive income (loss), net of tax | As Reported					5,010
Other comprehensive income (loss), net of tax | Adjustment					300
Other comprehensive income (loss), net of tax				5,310	5,310
Dividend to Holdings			(216,926)		(216,926)
Stock-based compensation		2,043			2,043
Balance at Sep. 30, 2013		1,556,926	103,602	(14,401)	1,646,127
Balance (in shares) at Sep. 30, 2013	1
Increase (Decrease) in Shareholders' Equity
Net income (loss) | As Reported					(44,152)
Net income (loss)			(44,152)		(44,152)
Other comprehensive income (loss), net of tax | As Reported					(15,619)
Other comprehensive income (loss), net of tax | Adjustment					938
Other comprehensive income (loss), net of tax				(14,681)	(14,681)
Dividend to Holdings			(60,063)		(60,063)
Stock-based compensation		4,088			4,088
Balance (As Reported) at Sep. 30, 2014					1,509,093
Balance at Sep. 30, 2014		1,561,014	(613)	(29,082)	1,531,319
Balance (in shares) at Sep. 30, 2014	1
Increase (Decrease) in Shareholders' Equity
Net income (loss) | As Reported					74,418
Net income (loss)			74,418		74,418
Other comprehensive income (loss), net of tax | As Reported					(80,499)
Other comprehensive income (loss), net of tax | Adjustment					6,802
Other comprehensive income (loss), net of tax				(73,697)	(73,697)
Dividend to Holdings		(21,275)	(57,123)		(78,398)
Stock-based compensation		2,845			2,845
Balance (As Reported) at Sep. 30, 2015					1,431,746
Balance (Adjustment)					24,741
Balance at Sep. 30, 2015		$ 1,542,584	$ 16,682	$ (102,779)	$ 1,456,487
Balance (in shares) at Sep. 30, 2015	1