Condensed Consolidating Financial Statements of Guarantors of the Notes (Details 4) (USD $) In Thousands, unless otherwise specified	1 Months Ended	3 Months Ended								12 Months Ended						12 Months Ended
	Mar. 31, 2011	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010 Predecessor	Sep. 30, 2012 Parent Company	Sep. 30, 2011 Parent Company	Sep. 30, 2009 Parent Company	Sep. 30, 2010 Parent Company Predecessor	Sep. 30, 2012 Guarantor Subsidiaries	Sep. 30, 2011 Guarantor Subsidiaries	Sep. 30, 2010 Guarantor Subsidiaries Predecessor	Sep. 30, 2012 Non-Guarantor Subsidiaries	Sep. 30, 2011 Non-Guarantor Subsidiaries	Sep. 30, 2010 Non-Guarantor Subsidiaries Predecessor	Sep. 30, 2012 Eliminations	Sep. 30, 2011 Eliminations	Sep. 30, 2010 Eliminations Predecessor
Cash flows from operating activities:
Income from continuing operations										$ 146,471	$ 29,919	$ 213,670	$ 146,471	$ 29,919		$ 213,670	$ 199,395	$ 168,576	$ 245,601	$ 91,164	$ 58,478	$ 63,288	$ (290,559)	$ (227,054)	$ (308,889)
Adjustments to reconcile net income to net cash and cash equivalents provided by operating activities:
Equity in earnings of subsidiaries													(290,559)	(227,054)		(308,889)							290,559	227,054	308,889
Impairments and disposals of assets, net										764	2,104	10,417					266	1,555	10,033	498	549	384
Loss from discontinued operations		9,029	13,925	768	(674)	1,950	668	1,590	(1,428)	23,048	2,780	1,352								23,048	2,780	1,352
Depreciation of property, plant and equipment										58,311	55,589	47,505	5,275	4,840		4,909	37,603	36,211	30,548	15,433	14,538	12,048
Amortization of intangible assets										43,960	44,086	15,841					40,680	40,405	14,324	3,280	3,681	1,517
Foreign currency translation loss/(gain)										(289)	64	1,042	(12)	(331)		1,234				(277)	395	(192)
Stock-based compensation										2,680	1,788	23,109	2,482	1,506		21,865	72	179	617	126	103	627
Amortization of financing fees										14,411	15,076	1,412	14,411	15,076		1,412
Write-off of financing fees	20,824									9,289	20,824		9,289	20,824
Allowance for doubtful accounts										297	5,468	1,256					297	5,468	1,256
Amortization of incremental inventory fair value									122,104		122,104							83,952			38,152
Inventory reserves										(2,652)	22,364	934					(2,652)	22,364	934
Deferred income taxes										(17,057)	(30,934)	(13,000)					(23,852)	(30,934)	(17,751)	6,795		4,751
Excess income tax benefit from exercise of stock options												(6,646)				(6,646)
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable										(22,380)	(9,692)	22,988					(18,843)	(10,132)	21,759	(3,537)	440	1,229
Inventories										(44,790)	(38,934)	(18,373)					(28,139)	(10,887)	(5,106)	(16,651)	(28,047)	(13,267)
Other assets										(2,147)	8,943	(3,755)					2,066	4,303	2,890	(4,213)	4,640	(6,645)
Accounts payable										16,097	28,101	17,150					14,220	25,261	(4,959)	1,877	2,840	22,109
Accrued expenses and other liabilities										5,491	3,082	52,108					(14,924)	(14,936)	39,131	20,415	18,018	12,977
Intercompany accounts													279,288	321,271		353,896	(153,706)	(297,364)	(317,852)	(125,582)	(23,907)	(36,044)
Cash provided by operating activities of continuing operations										231,504	282,732	367,010	166,645	166,051		281,451	52,483	24,021	21,425	12,376	92,660	64,134
Cash provided by operating activities of discontinued operations										2,546	1,905	4,742								2,546	1,905	4,742
Net cash provided by operating activities										234,050	284,637	371,752	166,645	166,051		281,451	52,483	24,021	21,425	14,922	94,565	68,876
Cash flows from investing activities:
Purchase of property, plant and equipment										(86,314)	(43,999)	(69,454)	(20,287)	(1,652)		(1,829)	(41,182)	(17,443)	(21,279)	(24,845)	(24,904)	(46,346)
Net proceeds from sale of discontinued operations										515			515
Proceeds from sale of investments												2,000				2,000
Cash paid for acquisitions											(3,987,809)	(14,200)		(3,983,806)				(3,196)			(807)	(14,200)
Cash used in investing activities of continuing operations										(85,799)	(4,031,808)	(81,654)		(3,985,458)		171		(20,639)	(21,279)		(25,711)	(60,546)
Cash used in investing activities of discontinued operations											(235)	(449)									(235)	(449)
Net cash used in investing activities										(85,799)	(4,032,043)	(82,103)	(19,772)	(3,985,458)		171	(41,182)	(20,639)	(21,279)	(24,845)	(25,946)	(60,995)
Cash flows from financing activities:
Principal payments under long-term debt agreements and capital leases										(229,375)	(13,554)	(56,410)	(224,325)	(13,125)		(56,264)		(429)	(146)	(5,050)
Termination of interest rate swaps												(5,813)				(5,813)
Payments of financing fees											(138,227)	(1,524)		(138,227)		(1,524)
Excess income tax benefit from exercise of stock options												6,646				6,646
Proceeds from borrowings											2,400,000			2,400,000
Capital contribution										15	1,550,400			1,550,400
Proceeds from stock options exercised												10,621	15			10,621
Cash (used in) provided by financing activities of continuing operations										(229,360)	3,798,619	(46,480)		3,799,048		(46,334)		(429)	(146)
Cash used in financing activities of discontinued operations											(381)	(747)									(381)	(747)
Net cash (used in) provided by financing activities										(229,360)	3,798,238	(47,227)	(224,310)	3,799,048		(46,334)		(429)	(146)	(5,050)	(381)	(747)
Effect of exchange rate changes on cash and cash equivalents										1,839	(2,909)	(1,940)						335		1,839	(3,244)	(1,940)
Net (decrease) increase in cash and cash equivalents										(79,270)	47,923	240,482	(77,437)	(20,359)		235,288	11,301	3,288		(13,134)	64,994	5,194
Change in cash for discontinued operations		1,071				3,734				1,071	3,734	2,350								1,071	3,734	2,350
Cash and cash equivalents at beginning of year					393,335				341,678	393,335	341,678	98,846	261,098	281,457	46,169	46,169	3,288			128,949	60,221	52,677
Cash and cash equivalents at end of year		$ 315,136				$ 393,335				$ 315,136	$ 393,335	$ 341,678	$ 183,661	$ 261,098	$ 46,169	$ 281,457	$ 14,589	$ 3,288		$ 116,886	$ 128,949	$ 60,221