Segment Reporting (Tables)

6 Months Ended

Mar. 31, 2018

Segment Reporting [Abstract]

Schedule of net sales and other financial information by business segment

The following tables present operating and financial information by business segment (in thousands):

	Three Months Ended March 31, 2018
	Americas			EMEA			APAC			Unallocated Corporate Costs			Consolidated
Net sales	$	313,250		$	68,147		$	8,786		$	—		$	390,183
Income (loss) from operations	35,691			6,830			777			(10,102		)	33,196
Interest expense, net	(10,943		)	(997		)	(25		)	—			(11,965		)
Capital expenditures	1,412			75			87			—			1,574
Depreciation and amortization	6,283			929			73			—			7,285

	Three Months Ended March 31, 2017
	Americas			EMEA			APAC			Unallocated Corporate Costs			Consolidated
Net sales	$	293,025		$	64,434		$	7,140		$	—		$	364,599
Income (loss) from operations	27,076			7,956			1,448			(4,282		)	32,198
Interest expense, net	(8,091		)	(729		)	(22		)	—			(8,842		)
Capital expenditures	2,346			544			3			—			2,893
Depreciation and amortization	5,914			806			23			—			6,743

	Six Months Ended March 31, 2018
	Americas			EMEA			APAC			Unallocated Corporate Costs			Consolidated
Net sales	$	602,765		$	132,385		$	18,124		$	—		$	753,274
Income (loss) from operations	60,888			11,982			2,275			(17,377		)	57,768
Interest expense, net	(21,591		)	(2,161		)	(51		)	—			(23,803		)
Capital expenditures	2,370			400			139			—			2,909
Depreciation and amortization	12,659			1,735			147			—			14,541

	Six Months Ended March 31, 2017
	Americas			EMEA			APAC			Unallocated Corporate Costs			Consolidated
Net sales	$	560,963		$	128,339		$	14,668		$	—		$	703,970
Income (loss) from operations	49,103			16,675			1,884			(9,208		)	58,454
Interest expense, net	(18,208		)	(1,659		)	(48		)	—			(19,915		)
Capital expenditures	3,383			812			14			—			4,209
Depreciation and amortization	11,848			1,584			40			—			13,472

	As of March 31, 2018
	Americas		EMEA		APAC		Consolidated
Total assets	$	1,498,308	$	263,999	$	50,005	$	1,812,312
Goodwill	204,183		51,190		11,271		266,644

	As of September 30, 2017
	Americas		EMEA		APAC		Consolidated
Total assets	$	1,436,840	$	275,445	$	41,822	$	1,754,107
Goodwill	204,183		51,190		11,271		266,644