CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Revenue	$ 495,764	$ 500,107	$ 962,864	$ 994,256
Cost of goods and services	380,215	385,950	731,187	763,994
Gross profit	115,549	114,157	231,677	230,262
Selling, general and administrative expenses	92,489	91,586	182,232	182,885
Income from operations	23,060	22,571	49,445	47,377
Other income (expense)
Interest expense	(12,645)	(12,392)	(26,018)	(24,415)
Interest income	23	44	29	55
Other, net	(199)	(385)	(241)	170
Total other expense, net	(12,821)	(12,733)	(26,230)	(24,190)
Income before taxes	10,239	9,838	23,215	23,187
Provision for income taxes	5,194	3,743	5,906	6,304
Net income	$ 5,045	$ 6,095	$ 17,309	$ 16,883
Basic income (loss) per common share (in Dollars per share)	$ 0.12	$ 0.15	$ 0.43	$ 0.40
Weighted-average shares outstanding	41,277	41,426	40,307	41,697
Diluted income (loss) per common share (in Dollars per share)	$ 0.12	$ 0.14	$ 0.40	$ 0.38
Weighted-average shares outstanding	43,229	43,891	42,776	44,727
Dividends paid per common share (in Dollars per share)	$ 0.06	$ 0.05	$ 0.12	$ 0.10
Net income	$ 5,045	$ 6,095	$ 17,309	$ 16,883
Other comprehensive income (loss), net of taxes:
Foreign currency translation adjustments	8,409	13,683	(5,070)	10,334
Pension and other post retirement plans	544	386	1,088	772
Change in cash flow hedges	(1,020)	(1,649)	603	(2,664)
Total other comprehensive income (loss), net of taxes	7,933	12,420	(3,379)	8,442
Comprehensive income (loss), net	$ 12,978	$ 18,515	$ 13,930	$ 25,325