CONSOLIDATING GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION (Details) - Summary of Condensed Consolidating Statements of Operations and Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Condensed Income Statements, Captions [Line Items]
Revenue	$ 437,303	$ 352,277
Cost of goods and services	316,459	255,533
Gross profit	120,844	96,744
Selling, general and administrative expenses	105,807	78,884
Income from operations	15,037	17,860
Other income (expense)
Interest income (expense), net	(16,642)	(13,289)
Other, net	(468)	(140)
Total other expense, net	(17,110)	(13,429)
Income (loss) before taxes from continuing operations	(2,073)	4,431
Provision (benefit) for income taxes	(24,904)	(2,613)
Income (loss) before equity in net income of subsidiaries	22,831	7,044
Equity in net income (loss) of subsidiaries	0	0
Income from continuing operations	22,831	7,044
Income from operations of discontinued operations	11,466	8,545
Provision from income taxes	3,308	3,325
Income from discontinued operations	8,158	5,220
Net income	30,989	12,264
Change in cash flow hedges	39,347	952
Parent Company [Member]
Condensed Income Statements, Captions [Line Items]
Revenue	0	0
Cost of goods and services	0	0
Gross profit	0	0
Selling, general and administrative expenses	11,337	6,644
Income from operations	(11,337)	(6,644)
Other income (expense)
Interest income (expense), net	(6,774)	(4,027)
Other, net	(5)	(28)
Total other expense, net	(6,779)	(4,055)
Income (loss) before taxes from continuing operations	(18,116)	(10,699)
Provision (benefit) for income taxes	(29,692)	(9,029)
Income (loss) before equity in net income of subsidiaries	11,576	(1,670)
Equity in net income (loss) of subsidiaries	19,413	13,934
Income from continuing operations	30,989	12,264
Income from operations of discontinued operations	0	0
Provision from income taxes	0	0
Income from discontinued operations	0	0
Net income	30,989	12,264
Change in cash flow hedges	39,347	952
Guarantor Companies [Member]
Condensed Income Statements, Captions [Line Items]
Revenue	351,312	291,336
Cost of goods and services	262,575	218,839
Gross profit	88,737	72,497
Selling, general and administrative expenses	74,513	54,991
Income from operations	14,224	17,506
Other income (expense)
Interest income (expense), net	(6,202)	(5,954)
Other, net	323	402
Total other expense, net	(5,879)	(5,552)
Income (loss) before taxes from continuing operations	8,345	11,954
Provision (benefit) for income taxes	2,734	5,864
Income (loss) before equity in net income of subsidiaries	5,611	6,090
Equity in net income (loss) of subsidiaries	(652)	(3,983)
Income from continuing operations	4,959	2,107
Income from operations of discontinued operations	6,420	3,491
Provision from income taxes	2,060	1,804
Income from discontinued operations	4,360	1,687
Net income	9,319	3,794
Change in cash flow hedges	22,769	(2,849)
Non-Guarantor Companies [Member]
Condensed Income Statements, Captions [Line Items]
Revenue	92,519	68,551
Cost of goods and services	60,779	44,554
Gross profit	31,740	23,997
Selling, general and administrative expenses	20,049	17,341
Income from operations	11,691	6,656
Other income (expense)
Interest income (expense), net	(3,666)	(3,308)
Other, net	(324)	(172)
Total other expense, net	(3,990)	(3,480)
Income (loss) before taxes from continuing operations	7,701	3,176
Provision (benefit) for income taxes	2,057	552
Income (loss) before equity in net income of subsidiaries	5,644	2,624
Equity in net income (loss) of subsidiaries	5,611	6,090
Income from continuing operations	11,255	8,714
Income from operations of discontinued operations	5,046	5,054
Provision from income taxes	1,248	1,521
Income from discontinued operations	3,798	3,533
Net income	15,053	12,247
Change in cash flow hedges	47,447	18,890
Elimination [Member]
Condensed Income Statements, Captions [Line Items]
Revenue	(6,528)	(7,610)
Cost of goods and services	(6,895)	(7,860)
Gross profit	367	250
Selling, general and administrative expenses	(92)	(92)
Income from operations	459	342
Other income (expense)
Interest income (expense), net	0	0
Other, net	(462)	(342)
Total other expense, net	(462)	(342)
Income (loss) before taxes from continuing operations	(3)	0
Provision (benefit) for income taxes	(3)	0
Income (loss) before equity in net income of subsidiaries	0	0
Equity in net income (loss) of subsidiaries	(24,372)	(16,041)
Income from continuing operations	(24,372)	(16,041)
Income from operations of discontinued operations	0	0
Provision from income taxes	0	0
Income from discontinued operations	0	0
Net income	(24,372)	(16,041)
Change in cash flow hedges	$ (70,216)	$ (16,041)