Stockholders' Equity And Stock-Based Compensation (Tax Benefit from Exercise of Options) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Jun. 26, 2020	Jun. 28, 2019	Jun. 26, 2020	Jun. 28, 2019
Share-based Payment Arrangement [Abstract]
Employee Service Share-based Compensation, Tax Benefit from Exercise of Stock Options	$ 107	$ 104	$ 359	$ 305

Amount of tax benefit from exercise of option under share-based payment arrangement.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=SL79508275-113901

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration