CONSOLIDATING GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION (Details) - Summary of consolidated statement of operations and comprehensive income - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015
Condensed Income Statements, Captions [Line Items]
Revenue	$ 430,799	$ 358,114	$ 383,807	$ 352,277	$ 374,365	$ 347,327	$ 385,108	$ 370,235	$ 1,524,997	$ 1,477,035	$ 1,483,291
Cost of goods and services									1,116,881	1,076,342	1,090,944
Gross profit	114,520	98,870	97,981	96,745	104,311	102,267	95,661	98,454	408,116	400,693	392,347
Selling, general and administrative expenses									339,089	318,353	325,435
Restructuring and other related charges									0	0
Total operating expenses									339,089	318,353
Income from continuing operations									69,027	82,340	66,912
Other income (expense)
Interest income (expense), net									(51,449)	(49,877)	(47,515)
Other, net									(880)	(250)	(331)
Total other income (expense)									(52,329)	(50,127)	(47,846)
Income before taxes from continuing operations									16,698	32,213	19,066
Provision (benefit) for income taxes									(1,085)	12,432	6,772
Income (loss) before equity in net income of subsidiaries									17,783	19,781	12,294
Equity in net income (loss) of subsidiaries									0	0	0
Income (loss) from continuing operations									17,783	19,781	12,294
Income from operations of discontinued businesses									22,276	20,952	34,570
Provision from income taxes									25,147	10,723	12,575
Income (loss) from discontinued operations									(2,871)	10,229	21,995
Net income	$ (11,950)	$ 9,553	$ 5,045	$ 12,264	$ 5,531	$ 7,596	$ 6,095	$ 10,788	14,912	30,010	34,289
Comprehensive income (loss)									35,672	39,957	(26,835)
Parent Company [Member]
Condensed Income Statements, Captions [Line Items]
Revenue									0	0	0
Cost of goods and services									0	0	0
Gross profit									0	0	0
Selling, general and administrative expenses									42,273	26,427	22,637
Restructuring and other related charges									0	0
Total operating expenses									42,273	26,427
Income from continuing operations									(42,273)	(26,427)	(22,637)
Other income (expense)
Interest income (expense), net									(13,804)	(12,549)	(8,741)
Other, net									59	337	438
Total other income (expense)									(13,745)	(12,212)	(8,303)
Income before taxes from continuing operations									(56,018)	(38,639)	(30,940)
Provision (benefit) for income taxes									(11,338)	4,964	(31,241)
Income (loss) before equity in net income of subsidiaries									(44,680)	(43,603)	301
Equity in net income (loss) of subsidiaries									59,592	73,613	33,987
Income (loss) from continuing operations									14,912	30,010	34,288
Income from operations of discontinued businesses									0	0	2
Provision from income taxes									0	0	1
Income (loss) from discontinued operations									0	0	1
Net income									14,912	30,010	34,289
Comprehensive income (loss)									35,672	39,957	(26,835)
Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Revenue									1,284,189	1,277,241	1,265,201
Cost of goods and services									966,293	952,296	957,461
Gross profit									317,896	324,945	307,740
Selling, general and administrative expenses									232,720	228,961	236,777
Restructuring and other related charges									0	1,299
Total operating expenses									232,720	230,260
Income from continuing operations									85,176	94,685	70,963
Other income (expense)
Interest income (expense), net									(24,242)	(24,050)	(24,322)
Other, net									1,395	1,862	1,847
Total other income (expense)									(22,847)	(22,188)	(22,475)
Income before taxes from continuing operations									62,329	72,497	48,486
Provision (benefit) for income taxes									24,560	29,445	21,408
Income (loss) before equity in net income of subsidiaries									37,769	43,052	27,078
Equity in net income (loss) of subsidiaries									(25,231)	(2,858)	(38,487)
Income (loss) from continuing operations									12,538	40,194	(11,409)
Income from operations of discontinued businesses									16,827	15,625	33,175
Provision from income taxes									4,476	4,720	11,890
Income (loss) from discontinued operations									12,351	10,905	21,285
Net income									24,889	51,099	9,876
Comprehensive income (loss)									35,575	44,391	(14,316)
Non-Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Revenue									270,520	228,350	258,733
Cost of goods and services									181,634	154,181	175,449
Gross profit									88,886	74,169	83,284
Selling, general and administrative expenses									64,466	63,335	66,391
Restructuring and other related charges									0	(1,299)
Total operating expenses									64,466	62,036
Income from continuing operations									24,420	12,133	16,893
Other income (expense)
Interest income (expense), net									(13,403)	(13,278)	(14,452)
Other, net									(630)	(500)	(923)
Total other income (expense)									(14,033)	(13,778)	(15,375)
Income before taxes from continuing operations									10,387	(1,645)	1,520
Provision (benefit) for income taxes									(14,307)	(21,977)	16,605
Income (loss) before equity in net income of subsidiaries									24,694	20,332	(15,085)
Equity in net income (loss) of subsidiaries									37,770	43,052	27,078
Income (loss) from continuing operations									62,464	63,384	11,993
Income from operations of discontinued businesses									5,449	5,327	1,393
Provision from income taxes									20,671	6,003	684
Income (loss) from discontinued operations									(15,222)	(676)	709
Net income									47,242	62,708	12,702
Comprehensive income (loss)									38,337	90,560	(21,980)
Consolidation, Eliminations [Member]
Condensed Income Statements, Captions [Line Items]
Revenue									(29,712)	(28,556)	(40,643)
Cost of goods and services									(31,046)	(30,135)	(41,966)
Gross profit									1,334	1,579	1,323
Selling, general and administrative expenses									(370)	(370)	(370)
Restructuring and other related charges									0	0
Total operating expenses									(370)	(370)
Income from continuing operations									1,704	1,949	1,693
Other income (expense)
Interest income (expense), net									0	0	0
Other, net									(1,704)	(1,949)	(1,693)
Total other income (expense)									(1,704)	(1,949)	(1,693)
Income before taxes from continuing operations									0	0	0
Provision (benefit) for income taxes									0	0	0
Income (loss) before equity in net income of subsidiaries									0	0	0
Equity in net income (loss) of subsidiaries									(72,131)	(113,807)	(22,578)
Income (loss) from continuing operations									(72,131)	(113,807)	(22,578)
Income from operations of discontinued businesses									0	0	0
Provision from income taxes									0	0	0
Income (loss) from discontinued operations									0	0	0
Net income									(72,131)	(113,807)	(22,578)
Comprehensive income (loss)									$ (73,912)	$ (134,951)	$ 36,296