Consolidated Statements of Stockholders' Equity (USD $) In Thousands, unless otherwise specified	Common Stock	Capital in Excess of Par USD ($)	Retained Earnings USD ($)	Accumulated Other Comprehensive Income (Loss) USD ($)	Total USD ($)
Balance at Sep. 30, 2011		$ 1,552,188	$ 22,472	$ (37,765)	$ 1,536,895
Balance (in shares) at Sep. 30, 2011	1
Increase (Decrease) in Stockholders' Equity
Net income			146,471		146,471
Other comprehensive income, net of tax				19,171	19,171
Capital contribution		15			15
Stock-based compensation		2,680			2,680
Balance at Sep. 30, 2012		1,554,883	168,943	(18,594)	1,705,232
Balance (in shares) at Sep. 30, 2012	1
Increase (Decrease) in Stockholders' Equity
Net income			129,480		129,480
Other comprehensive income, net of tax				5,010	5,010
Dividend to Holdings			(216,926)		(216,926)
Stock-based compensation		2,043			2,043
Balance at Sep. 30, 2013		1,556,926	81,497	(13,584)	1,624,839
Balance (in shares) at Sep. 30, 2013	1
Increase (Decrease) in Stockholders' Equity
Net income			(44,152)		(44,152)
Other comprehensive income, net of tax				(15,619)	(15,619)
Dividend to Holdings			(60,063)		(60,063)
Stock-based compensation		4,088			4,088
Balance at Sep. 30, 2014		$ 1,561,014	$ (22,718)	$ (29,203)	$ 1,509,093
Balance (in shares) at Sep. 30, 2014	1