MARKETABLE SECURITIES (Tables)

9 Months Ended

Feb. 29, 2012

Summary of Marketable Securities by Asset Type

The following tables summarize marketable securities held at February 29, 2012 and May 31, 2011 by asset type:

	Available-For-Sale Securities
(In thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value (Net Carrying Amount)
February 29, 2012
Equity securities:
Stocks — foreign	$	1,016	$	267	$	(2	)	$	1,281
Stocks — domestic		25,049		3,470		(931	)		27,588
Kemrock global depository receipts		7,200		—		(114	)		7,086
Mutual funds — foreign		16,030		1,846		—			17,876
Mutual funds — domestic		38,521		2,013		(263	)		40,271
Total equity securities		87,816		7,596		(1,310	)		94,102
Fixed maturity:
U.S. treasury and other government		19,082		394		(73	)		19,403
Corporate bonds		2,365		333		(5	)		2,693
Foreign bonds		38		1		—			39
Mortgage-backed securities		240		109		—			349
Total fixed maturity securities		21,725		837		(78	)		22,484
Total	$	109,541	$	8,433	$	(1,388	)	$	116,586
	Available-For-Sale Securities
(In thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value (Net Carrying Amount)
May 31, 2011
Equity securities:
Stocks — foreign	$	25,387	$	12,162	$	—		$	37,549
Stocks — domestic		28,044		4,222		(417	)		31,849
Mutual funds — foreign		14,680		3,733		—			18,413
Mutual funds — domestic		30,565		2,246		(1,020	)		31,791
Total equity securities		98,676		22,363		(1,437	)		119,602
Fixed maturity:
U.S. treasury and other government		25,916		643		(79	)		26,480
Corporate bonds		2,729		301		(1	)		3,029
Mortgage-backed securities		432		101		(1	)		532
Total fixed maturity securities		29,077		1,045		(81	)		30,041
Total	$	127,753	$	23,408	$	(1,518	)	$	149,643

Summary of Securities in Unrealized Loss Position and Included in Accumulated Other Comprehensive Income, Aggregated by Length of Time Investments had been in Unrealized Loss Position

Summarized below are the securities we held at February 29, 2012 and May 31, 2011 that were in an unrealized loss position and that were included in accumulated other comprehensive income, aggregated by the length of time the investments had been in that position:

	February 29, 2012					May 31, 2011
	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
	(In thousands)
Total investments with unrealized losses	$	42,663	$	(1,388	)	$	21,612	$	(1,518	)
Unrealized losses with a loss position for less than 12 months		33,893		(1,139	)		19,721		(1,301	)
Unrealized losses with a loss position for more than 12 months		8,770		(249	)		1,891		(217	)

Net Carrying Values of Debt Securities by Contractual Maturity

The net carrying values of debt securities at February 29, 2012, by contractual maturity, are shown below. Expected maturities may differ from contractual maturities because the issuers of the securities may have the right to prepay obligations without prepayment penalties.

	Amortized Cost		Fair Value
	(In thousands)
Due:
Less than one year	$	2,679	$	2,632
One year through five years		11,591		11,861
Six years through ten years		5,031		5,175
After ten years		2,424		2,816
	$	21,725	$	22,484