Condensed Consolidating Financial Information (Condensed Consolidating Balance Sheet) (Details) (USD $) In Thousands	Jun. 30, 2011	Sep. 30, 2010	Jun. 30, 2010	Sep. 30, 2009
Current assets:
Cash and cash equivalents	$ 34,852	$ 90,984	$ 46,318	$ 15,934
Trade receivables, net	91,067	92,279
Inventories	40,525	40,848
Current and deferred income taxes	3,413	12,050
Other	16,060	9,106
Total current assets	185,917	245,267
Property, plant and equipment, net	220,651	268,650
Other assets:
Intangible assets, net	169,706	183,371
Goodwill	116,671	115,999
Investments in subsidiaries and intercompany accounts	0	0
Intercompany notes	0	0
Deferred income taxes	0	0
Other	76,338	75,687
Total other assets	362,715	375,057
Total assets	769,283	888,974	932,361
Current liabilities:
Accounts payable	13,930	15,412
Accrued personnel costs	23,125	27,703
Accrued interest	12,178	17,797
Current and deferred income taxes	42	0
Other Accrued Liabilities Excluding Taxes	49,302	37,392
Total current liabilities	98,577	98,304
Long-term liabilities:
Long-term debt	535,422	469,875
Deferred income taxes	5,825	9,739
Unrecognized income tax benefits	11,099	14,081
Other	15,808	15,034
Total long-term liabilities	568,154	508,729
Total liabilities	666,731	607,033
Commitments and contingencies
Stockholders' equity:
Common stock	61	60
Capital in excess of par value	636,700	633,171
Retained earnings (accumulated deficit)	(534,129)	(350,940)
Other	(80)	(350)
Total stockholders' equity	102,552	281,941
Total liabilities and stockholders' equity	769,283	888,974
Guarantor Subsidiaries [Member]
Current assets:
Cash and cash equivalents	18,378	21,168	11,108	(2,947)
Trade receivables, net	91,067	92,279
Inventories	40,525	40,848
Current and deferred income taxes	6,184	7,487
Other	14,185	8,911
Total current assets	170,339	170,693
Property, plant and equipment, net	220,373	268,300
Other assets:
Intangible assets, net	169,706	183,371
Goodwill	116,671	115,999
Investments in subsidiaries and intercompany accounts	322,998	311,417
Intercompany notes	(637,046)	(637,046)
Deferred income taxes	84,135	74,369
Other	50,202	49,200
Total other assets	106,666	97,310
Total assets	497,378	536,303
Current liabilities:
Accounts payable	13,829	15,263
Accrued personnel costs	10,600	13,033
Current and deferred income taxes	18,136	4,000
Other Accrued Liabilities Excluding Taxes	46,904	35,257
Total current liabilities	89,469	67,553
Long-term liabilities:
Deferred income taxes	86,459	86,698
Unrecognized income tax benefits	3,876	9,697
Other	9,429	9,987
Total long-term liabilities	99,764	106,382
Total liabilities	189,233	173,935
Commitments and contingencies
Stockholders' equity:
Common stock	209,346	209,346
Capital in excess of par value	249,152	249,152
Retained earnings (accumulated deficit)	(150,273)	(95,780)
Other	(80)	(350)
Total stockholders' equity	308,145	362,368
Total liabilities and stockholders' equity	497,378	536,303
Parent Company [Member]
Current assets:
Cash and cash equivalents	16,474	69,816	35,210	18,881
Current and deferred income taxes	5,057	7,579
Other	1,875	195
Total current assets	23,406	77,590
Property, plant and equipment, net	278	350
Other assets:
Investments in subsidiaries and intercompany accounts	135,500	147,081
Intercompany notes	637,046	637,046
Deferred income taxes	19,118	27,300
Other	26,136	26,487
Total other assets	817,800	837,914
Total assets	841,484	915,854
Current liabilities:
Accounts payable	101	149
Accrued personnel costs	12,525	14,670
Accrued interest	12,178	17,797
Current and deferred income taxes	(10,266)	(984)
Other Accrued Liabilities Excluding Taxes	2,398	2,135
Total current liabilities	16,936	33,767
Long-term liabilities:
Long-term debt	535,422	469,875
Deferred income taxes	22,619	24,710
Unrecognized income tax benefits	7,223	4,384
Other	6,379	5,047
Total long-term liabilities	571,643	504,016
Total liabilities	588,579	537,783
Commitments and contingencies
Stockholders' equity:
Common stock	61	60
Capital in excess of par value	636,700	633,171
Retained earnings (accumulated deficit)	(383,856)	(255,160)
Total stockholders' equity	252,905	378,071
Total liabilities and stockholders' equity	841,484	915,854
Eliminations and Reclassifications [Member]
Current assets:
Current and deferred income taxes	(7,828)	(3,016)
Total current assets	(7,828)	(3,016)
Other assets:
Investments in subsidiaries and intercompany accounts	(458,498)	(458,498)
Deferred income taxes	(103,253)	(101,669)
Total other assets	(561,751)	(560,167)
Total assets	(569,579)	(563,183)
Current liabilities:
Current and deferred income taxes	(7,828)	(3,016)
Total current liabilities	(7,828)	(3,016)
Long-term liabilities:
Deferred income taxes	(103,253)	(101,669)
Total long-term liabilities	(103,253)	(101,669)
Total liabilities	(111,081)	(104,685)
Commitments and contingencies
Stockholders' equity:
Common stock	(209,346)	(209,346)
Capital in excess of par value	(249,152)	(249,152)
Total stockholders' equity	(458,498)	(458,498)
Total liabilities and stockholders' equity	$ (569,579)	$ (563,183)