Other Comprehensive Income (Loss) (Schedule of Changes in each Component of AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at the beginning of the year	$ 485,054	$ 472,230	$ 477,932	$ 428,777
Other comprehensive net gain (loss) reclassifications	(231)	(5,476)	(5,035)	2,926
Net (gain) loss reclassified to earnings	(560)	(424)	(1,850)	552
Other comprehensive income (loss)	(791)	(5,900)	(6,885)	3,478
Balance at the end of the year	494,539	472,550	494,539	472,550
Other comprehensive income (loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at the beginning of the year	(4,618)	8,825	1,476	(553)
Other comprehensive income (loss)	(791)	(5,900)	(6,885)	3,478
Balance at the end of the year	(5,409)	2,925	(5,409)	2,925
Foreign Currency Translation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at the beginning of the year	(899)	11,617	1,772	3,946
Other comprehensive net gain (loss) reclassifications	506	(8,056)	(2,165)	(385)
Net (gain) loss reclassified to earnings	0	0	0	0
Other comprehensive income (loss)	506	(8,056)	(2,165)	(385)
Balance at the end of the year	(393)	3,561	(393)	3,561
Unrealized Derivative Instrument
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at the beginning of the year	3,031	4,013	6,320	1,953
Other comprehensive net gain (loss) reclassifications	(1,074)	2,089	(2,882)	3,359
Net (gain) loss reclassified to earnings	(655)	(516)	(2,136)	274
Other comprehensive income (loss)	(1,729)	1,573	(5,018)	3,633
Balance at the end of the year	1,302	5,586	1,302	5,586
Defined Benefit Pension Plan
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at the beginning of the year	(6,750)	(6,805)	(6,616)	(6,452)
Other comprehensive net gain (loss) reclassifications	337	491	12	(48)
Net (gain) loss reclassified to earnings	95	92	286	278
Other comprehensive income (loss)	432	583	298	230
Balance at the end of the year	$ (6,318)	$ (6,222)	$ (6,318)	$ (6,222)

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount after tax, before reclassification adjustments, of other comprehensive income (loss), attributable to parent.

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Amount after tax of other comprehensive income (loss) attributable to parent entity.

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