Condensed Consolidating Financial Information (Details 2) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Sep. 30, 2013	Jun. 30, 2013	Sep. 30, 2012
Current assets:
Cash and cash equivalents	$ 114,464	$ 75,316	$ 40,490	$ 53,782
Trade receivables, net	114,998	109,868
Inventories	56,053	37,383
Current and deferred income taxes	12,427	14,036
Other	12,402	7,280
Total current assets	310,344	243,883
Property, plant and equipment, net	176,281	159,619
Other assets:
Goodwill	186,040	137,198
Intangible assets, net	152,679	139,797
Other	42,896	43,512
Total other assets	381,615	320,507
Total assets	868,240	724,009	724,009
Current liabilities:
Accounts payable	24,857	21,810
Accrued personnel costs	42,049	47,746
Accrued interest	15,515	16,077
Current and deferred income taxes		120
Other accrued liabilities	42,067	55,268
Current portion of long-term debt	0	7,553
Total current liabilities	124,488	148,574
Long-term liabilities:
Long-term debt	599,539	449,420
Income taxes	20,980	24,637
Other	24,337	16,968
Total long-term liabilities	644,856	491,025
Total liabilities	769,344	639,599
Non-controlling interest in consolidated subsidiary	13,698	0
Stockholders' equity:
Common stock	73	73
Capital in excess of par value	722,872	720,828
Retained earnings (accumulated deficit)	(637,214)	(635,972)
Treasury stock	(533)	(519)
Total stockholders' equity	85,198	84,410
Total liabilities and stockholders' equity	868,240	724,009
Consolidation Eliminations [Member]
Current assets:
Current and deferred income taxes	(30,155)	(29,687)
Total current assets	(30,155)	(29,687)
Other assets:
Investments in subsidiaries	(386,127)	(282,979)
Intercompany accounts and notes	(913,068)	(997,528)
Deferred income taxes	(74,385)	(75,407)
Total other assets	(1,373,580)	(1,355,914)
Total assets	(1,403,735)	(1,385,601)
Current liabilities:
Current and deferred income taxes	(30,155)	(29,687)
Total current liabilities	(30,155)	(29,687)
Long-term liabilities:
Income taxes	(74,385)	(75,407)
Intercompany accounts and notes	(913,068)	(997,528)
Total long-term liabilities	(987,453)	(1,072,935)
Total liabilities	(1,017,608)	(1,102,622)
Stockholders' equity:
Capital in excess of par value	(522,975)	(458,498)
Retained earnings (accumulated deficit)	136,848	175,519
Total stockholders' equity	(386,127)	(282,979)
Total liabilities and stockholders' equity	(1,403,735)	(1,385,601)
Guarantor Subsidiaries [Member]
Current assets:
Cash and cash equivalents	102,997	70,747
Trade receivables, net	109,896	109,868
Inventories	53,204	37,383
Current and deferred income taxes	24,601	25,828
Other	10,070	6,548
Total current assets	300,768	250,374
Property, plant and equipment, net	158,514	155,499
Other assets:
Goodwill	150,547	137,198
Intangible assets, net	128,152	139,797
Intercompany accounts and notes	276,022	360,482
Deferred income taxes	54,404	53,228
Other	15,235	22,300
Total other assets	624,360	713,005
Total assets	1,083,642	1,118,878
Current liabilities:
Accounts payable	23,818	21,051
Accrued personnel costs	9,391	14,622
Current and deferred income taxes	29,505	20,073
Other accrued liabilities	35,895	52,898
Total current liabilities	98,609	108,644
Long-term liabilities:
Income taxes	80,276	80,877
Intercompany accounts and notes	571,136	637,046
Other	13,033	9,332
Total long-term liabilities	664,445	727,255
Total liabilities	763,054	835,899
Stockholders' equity:
Capital in excess of par value	458,499	458,498
Retained earnings (accumulated deficit)	(137,911)	(175,519)
Total stockholders' equity	320,588	282,979
Total liabilities and stockholders' equity	1,083,642	1,118,878
Non Guarantor Subsidiaries [Member]
Current assets:
Cash and cash equivalents	5,177
Trade receivables, net	5,102
Inventories	2,849
Other	237
Total current assets	13,365
Property, plant and equipment, net	11,457
Other assets:
Goodwill	35,493
Intangible assets, net	24,527
Other	1,200
Total other assets	61,220
Total assets	86,042
Current liabilities:
Accounts payable	795
Accrued personnel costs	326
Current and deferred income taxes	650
Other accrued liabilities	3,665
Total current liabilities	5,436
Long-term liabilities:
Intercompany accounts and notes	1,433
Other	94
Total long-term liabilities	1,527
Total liabilities	6,963
Non-controlling interest in consolidated subsidiary	13,698
Stockholders' equity:
Capital in excess of par value	64,318
Retained earnings (accumulated deficit)	1,063
Total stockholders' equity	65,381
Total liabilities and stockholders' equity	86,042
Parent Company [Member]
Current assets:
Cash and cash equivalents	6,290	4,569
Current and deferred income taxes	17,981	17,895
Other	2,095	732
Total current assets	26,366	23,196
Property, plant and equipment, net	6,310	4,120
Other assets:
Investments in subsidiaries	386,127	282,979
Intercompany accounts and notes	637,046	637,046
Deferred income taxes	19,981	22,179
Other	26,461	21,212
Total other assets	1,069,615	963,416
Total assets	1,102,291	990,732
Current liabilities:
Accounts payable	244	759
Accrued personnel costs	32,332	33,124
Accrued interest	15,515	16,077
Current and deferred income taxes		9,734
Other accrued liabilities	2,507	2,370
Current portion of long-term debt		7,553
Total current liabilities	50,598	69,617
Long-term liabilities:
Long-term debt	599,539	449,420
Income taxes	15,089	19,167
Intercompany accounts and notes	340,499	360,482
Other	11,210	7,636
Total long-term liabilities	966,337	836,705
Total liabilities	1,016,935	906,322
Stockholders' equity:
Common stock	73	73
Capital in excess of par value	723,030	720,828
Retained earnings (accumulated deficit)	(637,214)	(635,972)
Treasury stock	(533)	(519)
Total stockholders' equity	85,356	84,410
Total liabilities and stockholders' equity	$ 1,102,291	$ 990,732