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Note 12 - Changes to the Components of Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jun. 30, 2018
Jun. 24, 2017
Jun. 30, 2018
Jun. 24, 2017
Beginning Balance     $ 682,322  
Ending Balance $ 738,075   738,075  
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]        
Beginning Balance (11,330) $ (12,296) (9,341) $ (13,086)
Other comprehensive loss before reclassifications (2,359) 1,095 (4,348) 1,885
Amounts reclassified from accumulated other comprehensive income
Ending Balance (13,689) (11,201) (13,689) (11,201)
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]        
Beginning Balance 172 166 466 (329)
Other comprehensive loss before reclassifications (328) 204 (622) 699
Amounts reclassified from accumulated other comprehensive income 75 75
Ending Balance (81) 370 (81) 370
AOCI Attributable to Parent [Member]        
Beginning Balance (11,158) (12,130) (8,875) (13,415)
Other comprehensive loss before reclassifications (2,687) 1,299 (4,970) 2,584
Amounts reclassified from accumulated other comprehensive income 75 75
Ending Balance $ (13,770) $ (10,831) $ (13,770) $ (10,831)