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, 2015	Dec. 31, 2014
Condensed Income Statements, Captions [Line Items]
Revenue	$ 494,149	$ 502,160
Cost of goods and services	378,044	384,171
Gross profit	116,105	117,989
Selling, general and administrative expenses	91,299	93,896
Total operating expenses	91,299
Income from operations	24,806	24,093
Other income (expense)
Interest income (expense), net	(12,012)	(11,637)
Other, net	555	(451)
Total other expense, net	(11,457)	(12,088)
Income before taxes	13,349	12,005
Provision (benefit) for income taxes	4,753	4,534
Income (loss) before equity in net income of subsidiaries	8,596	7,471
Equity in net income (loss) of subsidiaries	0	0
Net income	8,596	7,471
Other comprehensive income (loss), net of taxes	(3,978)	(16,183)
Comprehensive income (loss), net	4,618	(8,712)
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	6,397	5,520
Total operating expenses	6,397
Income from operations	(6,397)	(5,520)
Other income (expense)
Interest income (expense), net	(2,256)	(1,904)
Other, net	193	46
Total other expense, net	(2,063)	(1,858)
Income before taxes	(8,460)	(7,378)
Provision (benefit) for income taxes	(5,797)	(3,481)
Income (loss) before equity in net income of subsidiaries	(2,663)	(3,897)
Equity in net income (loss) of subsidiaries	11,259	11,368
Net income	8,596	7,471
Other comprehensive income (loss), net of taxes	(3,978)	(16,183)
Comprehensive income (loss), net	4,618	(8,712)
Guarantor Companies [Member]
Condensed Income Statements, Captions [Line Items]
Revenue	389,260	378,114
Cost of goods and services	298,384	289,370
Gross profit	90,876	88,744
Selling, general and administrative expenses	65,948	69,557
Total operating expenses	65,948
Income from operations	24,928	19,187
Other income (expense)
Interest income (expense), net	(7,789)	(7,427)
Other, net	1,016	1,295
Total other expense, net	(6,773)	(6,132)
Income before taxes	18,155	13,055
Provision (benefit) for income taxes	8,817	7,737
Income (loss) before equity in net income of subsidiaries	9,338	5,318
Equity in net income (loss) of subsidiaries	1,929	6,036
Net income	11,267	11,354
Other comprehensive income (loss), net of taxes	139	(4,580)
Comprehensive income (loss), net	11,406	6,774
Non-Guarantor Companies [Member]
Condensed Income Statements, Captions [Line Items]
Revenue	112,732	138,881
Cost of goods and services	87,896	108,274
Gross profit	24,836	30,607
Selling, general and administrative expenses	19,046	20,099
Total operating expenses	19,046
Income from operations	5,790	10,508
Other income (expense)
Interest income (expense), net	(1,967)	(2,306)
Other, net	(169)	(1,874)
Total other expense, net	(2,136)	(4,180)
Income before taxes	3,654	6,328
Provision (benefit) for income taxes	1,733	278
Income (loss) before equity in net income of subsidiaries	1,921	6,050
Equity in net income (loss) of subsidiaries	9,338	5,318
Net income	11,259	11,368
Other comprehensive income (loss), net of taxes	(4,117)	(10,831)
Comprehensive income (loss), net	7,142	537
Elimination [Member]
Condensed Income Statements, Captions [Line Items]
Revenue	(7,843)	(14,835)
Cost of goods and services	(8,236)	(13,473)
Gross profit	393	(1,362)
Selling, general and administrative expenses	(92)	(1,280)
Total operating expenses	(92)
Income from operations	485	(82)
Other income (expense)
Interest income (expense), net	0	0
Other, net	(485)	82
Total other expense, net	(485)	82
Income before taxes	0	0
Provision (benefit) for income taxes	0	0
Income (loss) before equity in net income of subsidiaries	0	0
Equity in net income (loss) of subsidiaries	(22,526)	(22,722)
Net income	(22,526)	(22,722)
Other comprehensive income (loss), net of taxes	3,978	15,411
Comprehensive income (loss), net	$ (18,548)	$ (7,311)