SEGMENT AND GEOGRAPHIC INFORMATION (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014	Sep. 30, 2014
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 653,257us-gaap_Assets		$ 653,257us-gaap_Assets		$ 688,585us-gaap_Assets
Property and equipment, net	85,017us-gaap_PropertyPlantAndEquipmentNet		85,017us-gaap_PropertyPlantAndEquipmentNet		79,703us-gaap_PropertyPlantAndEquipmentNet
Net sales	122,719us-gaap_SalesRevenueNet	128,589us-gaap_SalesRevenueNet	245,106us-gaap_SalesRevenueNet	249,778us-gaap_SalesRevenueNet
Intercompany revenues	122,719us-gaap_Revenues	128,589us-gaap_Revenues	245,106us-gaap_Revenues	249,778us-gaap_Revenues
Revenue from Related Parties	0us-gaap_RevenueFromRelatedParties	0us-gaap_RevenueFromRelatedParties	0us-gaap_RevenueFromRelatedParties	0us-gaap_RevenueFromRelatedParties
Income (loss) before income taxes	12,351	6,608	20,759	10,093
North America
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	245,160		245,160		246,370
Property and equipment, net	15,570		15,570		16,319
Net sales	38,999	35,722	75,131	68,477
Intercompany revenues	35,340	31,878	68,111	62,376
Revenue from Related Parties	3,659	3,844	7,020	6,101
Income (loss) before income taxes	735	2,256	878	2,274
Germany
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	404,006		404,006		430,123
Property and equipment, net	45,882		45,882		41,828
Net sales	73,497	76,954	151,210	153,126
Intercompany revenues	38,000	41,294	78,664	83,409
Revenue from Related Parties	35,497	35,660	72,546	69,717
Income (loss) before income taxes	5,420	(745)	9,985	(2,350)
Other
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	324,084		324,084		347,992
Property and equipment, net	23,828		23,828		21,822
Net sales	62,117	68,905	123,570	132,427
Intercompany revenues	49,379	55,417	98,331	103,993
Revenue from Related Parties	12,738	13,488	25,239	28,434
Income (loss) before income taxes	6,429	5,507	10,756	11,616
Geography Eliminations [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	(319,993)		(319,993)		(335,900)
Property and equipment, net	(263)		(263)		(266)
Net sales	(51,894)	(52,992)	(104,805)	(104,252)
Income (loss) before income taxes	(233)	(410)	(860)	(1,447)
Consolidation, Eliminations [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Revenue from Related Parties	$ (51,894)	$ (52,992)	$ (104,805)	$ (104,252)

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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