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Discontinued Operations (Narrative) (Details) - USD ($)
3 Months Ended 6 Months Ended 9 Months Ended
Jul. 01, 2018
Jun. 30, 2019
Jul. 01, 2018
Jul. 02, 2017
Sep. 29, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Proceeds from sale $ 4,000,000     $ 68,448,000  
Cash provided by (used in) operating activities of discontinued operations   $ (1,050,000) $ (562,000)    
Cash provided by (used in) investing activities related to discontinued operations   $ 3,107,000 $ 6,134,000    
Original lease agreement [Member]          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Term of lease         10 years
Amended lease agreement [Member]          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Term of lease         14 years
Lease renewal period         3 years
Assets Held For Sale [Member]          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Gain on divestiture, net $ 0     $ 11,413,000  
Assets Held For Sale [Member] | Original lease agreement [Member]          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Total annual lease payments         $ 1,288,000
Assets Held For Sale [Member] | Current twelve month estimate [Member] | Amended lease agreement [Member]          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Total annual lease payments         $ 1,755,000
Minimum [Member] | Amended lease agreement [Member]          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Early termination term         5 years
Maximum [Member] | Amended lease agreement [Member]          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Early termination term         10 years