Other Comprehensive Income (Loss) (Schedule Of Amounts Reclassified Out Of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Mar. 31, 2018	Apr. 01, 2017	Mar. 31, 2018	Apr. 01, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total revenue	$ 191,323	$ 193,424	$ 385,485	$ 392,703
Cost of sales	(116,498)	(114,568)	(232,732)	(240,383)
Selling and marketing	(30,597)	(30,627)	(62,625)	(61,097)
General and administrative	(18,992)	(23,556)	(39,554)	(47,579)
Interest expense, net	(6,708)	(7,418)	(13,512)	(14,698)
Income before income taxes	10,176	8,660	19,646	10,841
Provision for income taxes	(1,738)	(1,461)	21,943	(1,937)
Net income	8,438	7,199	41,589	8,904
Reclassification Out Of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income	(782)	(229)	(976)	(131)
Reclassification Out Of Accumulated Other Comprehensive Income \| Unrealized Derivative Instrument
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Provision for income taxes	239	36	275	(115)
Net income	(687)	(62)	(790)	206
Reclassification Out Of Accumulated Other Comprehensive Income \| Defined Benefit Pension Plan
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	(75)	(130)	(146)	(263)
Selling and marketing	(38)	(67)	(75)	(136)
General and administrative	(24)	(41)	(46)	(83)
Income before income taxes	(137)	(238)	(267)	(482)
Provision for income taxes	42	71	81	145
Net income	(95)	(167)	(186)	(337)
Reclassification Out Of Accumulated Other Comprehensive Income \| Currency exchange contracts gain (loss) \| Unrealized Derivative Instrument
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total revenue	(1,146)	318	(1,304)	737
Reclassification Out Of Accumulated Other Comprehensive Income \| Interest rate swaps \| Unrealized Derivative Instrument
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense, net	$ 220	$ (416)	$ 239	$ (416)

The aggregate cost of goods produced and sold and services rendered during the reporting period.

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Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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