CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Income Statement [Abstract]
Revenue	$ 1,957,161	$ 2,016,032	$ 1,991,811
Cost of goods and services	1,483,727	1,540,254	1,532,412
Gross profit	473,434	475,778	459,399
Selling, general and administrative expenses	364,027	374,761	375,099
Restructuring and other related charges	5,900	0	6,136
Total operating expenses	369,927	374,761	381,235
Income from operations	103,507	101,017	78,164
Other income (expense)
Interest expense	(51,254)	(48,173)	(48,447)
Interest income	143	301	303
Loss from debt extinguishment	0	0	(38,890)
Other, net	768	491	3,154
Total other income (expense)	(50,343)	(47,381)	(83,880)
Income (loss) before taxes	53,164	53,636	(5,716)
Provision (benefit) for income taxes	23,154	19,347	(5,539)
Net income (loss)	$ 30,010	$ 34,289	$ (177)
Basic earnings (loss) per common share (in Dollars per share)	$ 0.73	$ 0.77	$ 0.00
Weighted-average shares outstanding (in Shares)	41,074	44,608	49,367
Diluted earnings (loss) per common share (in Dollars per share)	$ 0.68	$ 0.73	$ 0.00
Weighted-average shares outstanding (in Shares)	44,109	46,939	49,367
Other comprehensive income (loss), net of taxes:
Foreign currency translation adjustments	$ 17,284	$ (56,358)	$ (23,933)
Pension and other post-retirement plans	(5,651)	(4,326)	(3,914)
Change in available-for-sale securities	0	(870)	870
Gain (loss) on cash flow hedge	(1,686)	430	252
Total other comprehensive income (loss), net of taxes	9,947	(61,124)	(26,725)
Comprehensive income (loss)	$ 39,957	$ (26,835)	$ (26,902)