Note C - Investment Securities (Details) - Held to Maturity Securities by Contractual Maturity - USD ($) $ in Thousands	Sep. 26, 2015	Sep. 27, 2014
Held to Maturity Securities by Contractual Maturity [Abstract]
Due after one year through five years	$ 63,522	$ 0
Due after one year through five years	63,010	0
Due after five years through ten years	3,138	2,000
Due after five years through ten years	3,002	1,987
Total held to maturity securities	66,660	2,000
Total held to maturity securities	66,012	1,987
Long term held to maturity securities	66,660	2,000
Long term held to maturity securities	$ 66,012	$ 1,987