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		6 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Mar. 31, 2017	Mar. 31, 2016
Condensed Income Statements, Captions [Line Items]
Revenue	$ 467,100	$ 494,149		$ 0
Cost of goods and services	350,972	378,044		0
Gross profit	116,128	116,105		0
Selling, general and administrative expenses	89,743	91,299		0
Total operating expenses				0
Income from operations	26,385	24,806		0
Other income (expense)
Interest income (expense), net	(13,367)	(12,012)		0
Loss from debt extinguishment, net				0
Other, net	(42)	555		0
Total other expense, net	(13,409)	(11,457)		0
Income before taxes	12,976	13,349		0
Provision (benefit) for income taxes	712	2,561		0
Income (loss) before equity in net income of subsidiaries		10,788		0
Equity in net income (loss) of subsidiaries		0		0
Net income	12,264	10,788		0
Foreign currency translation adjustments	(13,479)	(3,349)
Other comprehensive income (loss), net of taxes	(11,312)	(3,978)		0
Comprehensive income (loss), net	952	6,810		0
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		0
Total operating expenses				0
Income from operations		(6,397)		0
Other income (expense)
Interest income (expense), net		(2,256)		0
Loss from debt extinguishment, net				0
Other, net		193		0
Total other expense, net		(2,063)		0
Income before taxes		(8,460)		0
Provision (benefit) for income taxes		(7,989)		0
Income (loss) before equity in net income of subsidiaries		(471)		0
Equity in net income (loss) of subsidiaries		11,259		0
Net income	12,264	10,788		0
Other comprehensive income (loss), net of taxes		(3,978)		0
Comprehensive income (loss), net		6,810		0
Guarantor Companies [Member]
Condensed Income Statements, Captions [Line Items]
Revenue	359,861	389,260		0
Cost of goods and services		298,384		0
Gross profit		90,876		0
Selling, general and administrative expenses	62,997	65,948		0
Total operating expenses				0
Income from operations		24,928		0
Other income (expense)
Interest income (expense), net		(7,789)		0
Loss from debt extinguishment, net				0
Other, net	651	1,016		0
Total other expense, net	(7,407)	(6,773)		0
Income before taxes		18,155		0
Provision (benefit) for income taxes		8,817		0
Income (loss) before equity in net income of subsidiaries	10,057	9,338		0
Equity in net income (loss) of subsidiaries		1,929		0
Net income	13,855	11,267		0
Other comprehensive income (loss), net of taxes		139		0
Comprehensive income (loss), net		11,406		0
Non-Guarantor Companies [Member]
Condensed Income Statements, Captions [Line Items]
Revenue		112,732		0
Cost of goods and services		87,896		0
Gross profit		24,836		0
Selling, general and administrative expenses		19,046		0
Total operating expenses				0
Income from operations		5,790		0
Other income (expense)
Interest income (expense), net		(1,967)		0
Loss from debt extinguishment, net				0
Other, net	(444)	(169)		0
Total other expense, net		(2,136)		0
Income before taxes		3,654		0
Provision (benefit) for income taxes		1,733		0
Income (loss) before equity in net income of subsidiaries		1,921		0
Equity in net income (loss) of subsidiaries	10,057	9,338		0
Net income	13,813	11,259		0
Other comprehensive income (loss), net of taxes		(4,117)		0
Comprehensive income (loss), net		7,142		0
Elimination [Member]
Condensed Income Statements, Captions [Line Items]
Revenue		(7,843)		0
Cost of goods and services		(8,236)		0
Gross profit		393		0
Selling, general and administrative expenses	(92)	(92)		0
Total operating expenses				0
Income from operations		485		0
Other income (expense)
Interest income (expense), net		0		0
Loss from debt extinguishment, net				0
Other, net	(342)	(485)		0
Total other expense, net		(485)		0
Income before taxes		0		0
Provision (benefit) for income taxes		0		0
Income (loss) before equity in net income of subsidiaries	0	0		0
Equity in net income (loss) of subsidiaries		(22,526)		0
Net income	(27,668)	(22,526)		0
Other comprehensive income (loss), net of taxes	$ (9,317)	3,978		0
Comprehensive income (loss), net		$ (18,548)		$ 0
Scenario, Forecast [Member]
Condensed Income Statements, Captions [Line Items]
Revenue			$ 0
Cost of goods and services			0
Gross profit			0
Selling, general and administrative expenses			0
Restructuring and other related charges			0
Total operating expenses			0
Income from operations			0
Other income (expense)
Interest income (expense), net			0
Other, net			0
Total other expense, net			0
Income before taxes			0
Provision (benefit) for income taxes			0
Income (loss) before equity in net income of subsidiaries			0
Equity in net income (loss) of subsidiaries			0
Net income			0
Other comprehensive income (loss), net of taxes			0
Comprehensive income (loss), net			0
Scenario, Forecast [Member] | Parent Company [Member]
Condensed Income Statements, Captions [Line Items]
Revenue			0
Cost of goods and services			0
Gross profit			0
Selling, general and administrative expenses			0
Restructuring and other related charges			0
Total operating expenses			0
Income from operations			0
Other income (expense)
Interest income (expense), net			0
Other, net			0
Total other expense, net			0
Income before taxes			0
Provision (benefit) for income taxes			0
Income (loss) before equity in net income of subsidiaries			0
Equity in net income (loss) of subsidiaries			0
Net income			0
Other comprehensive income (loss), net of taxes			0
Comprehensive income (loss), net			0
Scenario, Forecast [Member] | Guarantor Companies [Member]
Condensed Income Statements, Captions [Line Items]
Revenue			0
Cost of goods and services			0
Gross profit			0
Selling, general and administrative expenses			0
Restructuring and other related charges			0
Total operating expenses			0
Income from operations			0
Other income (expense)
Interest income (expense), net			0
Other, net			0
Total other expense, net			0
Income before taxes			0
Provision (benefit) for income taxes			0
Income (loss) before equity in net income of subsidiaries			0
Equity in net income (loss) of subsidiaries
Net income			0
Other comprehensive income (loss), net of taxes			0
Comprehensive income (loss), net			0
Scenario, Forecast [Member] | Non-Guarantor Companies [Member]
Condensed Income Statements, Captions [Line Items]
Revenue			0
Cost of goods and services			0
Gross profit			0
Selling, general and administrative expenses			0
Restructuring and other related charges			0
Total operating expenses			0
Income from operations			0
Other income (expense)
Interest income (expense), net			0
Other, net			0
Total other expense, net			0
Income before taxes			0
Provision (benefit) for income taxes			0
Income (loss) before equity in net income of subsidiaries			0
Equity in net income (loss) of subsidiaries			0
Net income			0
Other comprehensive income (loss), net of taxes			0
Comprehensive income (loss), net			0
Scenario, Forecast [Member] | Elimination [Member]
Condensed Income Statements, Captions [Line Items]
Revenue			0
Cost of goods and services			0
Gross profit			0
Selling, general and administrative expenses			0
Restructuring and other related charges			0
Total operating expenses			0
Income from operations			0
Other income (expense)
Interest income (expense), net			0
Other, net			0
Total other expense, net			0
Income before taxes			0
Provision (benefit) for income taxes			0
Income (loss) before equity in net income of subsidiaries			0
Equity in net income (loss) of subsidiaries			0
Net income			0
Other comprehensive income (loss), net of taxes			0
Comprehensive income (loss), net			$ 0