Note C - Investment Securities - Held-to-maturity Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Sep. 24, 2016
Due in one year or less, amortized cost	$ 59,113	$ 13,539
Due in one year or less, fair market value	59,194	13,552
Due after one year through five years, amortized cost	60,908	90,732
Due after one year through five years, fair market value	61,113	91,326
Due after five years through ten years, amortized cost	0	0
Due after five years through ten years, fair market value	0	0
Total held to maturity securities, amortized cost	120,021	104,271
Total held to maturity securities, fair market value	120,307	104,878
Less current portion, amortized cost	59,113	13,539
Less current portion, fair market value	59,194	13,552
Long term held to maturity securities, amortized cost	60,908	90,732
Long term held to maturity securities, fair market value	$ 61,113	$ 91,326