Note 12 - Changes to the Components of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 30, 2017	Dec. 24, 2016
Beginning Balance	$ 682,322
Ending Balance	707,381
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Beginning Balance	(9,341)	$ (13,086)
Other comprehensive loss before reclassifications	(3,887)	(1,104)
Amounts reclassified from accumulated other comprehensive income	0	0
Ending Balance	(13,228)	(14,190)
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Beginning Balance	466	(329)
Other comprehensive loss before reclassifications	(110)	(103)
Amounts reclassified from accumulated other comprehensive income	0
Ending Balance	356	(432)
AOCI Attributable to Parent [Member]
Beginning Balance	(8,875)	(13,415)
Other comprehensive loss before reclassifications	(3,997)	(1,207)
Amounts reclassified from accumulated other comprehensive income	0
Ending Balance	$ (12,872)	$ (14,622)