Consolidated Statements of Stockholder's Equity (USD $) In Thousands, unless otherwise specified	Total USD ($)	Common Stock	Capital in Excess of Par USD ($)	Retained Earnings USD ($)	Accumulated Other Comprehensive Income (Loss) USD ($)	Comprehensive Income (Loss) USD ($)
Balance at Sep. 30, 2010
Components of comprehensive income (loss):
Net income	$ 29,919			$ 29,919		$ 29,919
Foreign currency translation adjustment, net of taxes	(20,196)				(20,196)	(20,196)
Change in fair value of interest rate and cross currency swaps, net of taxes	(17,569)				(17,569)	(17,569)
Comprehensive income (loss)	(7,846)					(7,846)
Opening equity of Merger sub	(7,447)			(7,447)
Opening equity of Merger sub (in shares)		1
Capital contribution from Holdings	1,550,400		1,550,400
Stock-based compensation	1,788		1,788
Balance at Sep. 30, 2011	1,536,895		1,552,188	22,472	(37,765)
Balance (in shares) at Sep. 30, 2011		1
Components of comprehensive income (loss):
Net income	146,471			146,471		146,471
Foreign currency translation adjustment, net of taxes	23,107				23,107	23,107
Change in fair value of interest rate and cross currency swaps, net of taxes	(3,936)				(3,936)	(3,936)
Comprehensive income (loss)	165,642					165,642
Capital contribution from Holdings	15		15
Stock-based compensation	2,680		2,680
Balance at Sep. 30, 2012	1,705,232		1,554,883	168,943	(18,594)
Balance (in shares) at Sep. 30, 2012		1
Components of comprehensive income (loss):
Net income	129,480			129,480		129,480
Foreign currency translation adjustment, net of taxes	(682)				(682)	(682)
Change in fair value of interest rate and cross currency swaps, net of taxes	5,692				5,692	5,692
Comprehensive income (loss)	134,490					134,490
Dividends to Holdings	(216,926)			(216,926)
Stock-based compensation	2,043		2,043
Balance at Sep. 30, 2013	$ 1,624,839		$ 1,556,926	$ 81,497	$ (13,584)
Balance (in shares) at Sep. 30, 2013		1