Available-For-Sale Securities - Classified As Current Assets (Tables)

12 Months Ended

May 31, 2014

Available-For-Sale Securities - Classified As Current Assets [Abstract]

Schedule Of Available-For-Sale Securities Classified As Current Assets

	May 31, 2014
		Gains in	Losses in
		Accumulated	Accumulated	Estimated
	Amortized	Other	Other	Fair
	Cost	Comprehensive	Comprehensive	Value
		Income	Income
State municipal bonds	$              75,659	$                   188	$                       -	$              75,847
US government obligations	4,056	5	-	4,061
Corporate bonds	102,587	98	-	102,685
Commercial paper	3,927	3	-	3,930
Certificates of deposit	350	1	-	351
Variable rate demand notes	2,000	-	-	2,000
Government agency bonds	4,791	7	-	4,798
Foreign government obligations	1,064	2	-	1,066
Total current available-for-sale securities	$            194,434	$                   304	$                       -	$            194,738
Mutual funds*	999	452	-	1,451
Total noncurrent available-for-sale securities	$                   999	$                   452	$                       -	$                1,451

*The mutual funds are classified as long term and are a part of “other investments” in the Consolidated Balance Sheet.

	June 1, 2013
		Gains in	Losses in
		Accumulated	Accumulated	Estimated
	Amortized	Other	Other	Fair
	Cost	Comprehensive	Comprehensive	Value
		Income	Income
State municipal bonds	$ 61,124	$                    71	$                      -	$             61,195
US government obligations	12,378	-	1	12,377
Corporate bonds	64,406	-	23	64,383
Certificates of deposit	12,280	5	-	12,285
Government agency bonds	7,659	5	-	7,664
Total current available-for-sale securities	$           157,847	$                    81	$                    24	$           157,904
Mutual funds*	721	305	-	1,026
Total noncurrent available-for-sale securities	$                  721	$                  305	$                      -	$               1,026

*The mutual funds are classified as long term and are a part of “other investments”in the Consolidated Balance Sheet.

Schedule Of Contractual Maturities Of Available-For-Sale Debt Securities

	Estimated Fair Value
Within one year	$                   88,944
After 1-5 years	105,794
After 5-10 years	-
	$                 194,738