Consolidated Statement Of Stockholders' Equity (USD $) In Thousands, except Share data	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Total
Balance at May. 31, 2014	$ 567	$ 360,445	$ (2,573)	$ 298,830	$ (311,508)	$ 345,761
Balance (in shares) at May. 31, 2014	56,738,000				18,580,000	38,158,000
Exercise of stock options	1	1,596
Exercise of stock options (in shares)	128,000					128
Stock-based compensation expense related to share-based awards and employee stock purchases		1,546
Issuance of restricted stock (in shares)	6,000
Tax shortfall from employee stock option plans		(84)
Issuance of common stock under Employee Stock Purchase Plan	2	1,898
Issuance of common stock under Employee Stock Purchase Plan (in shares)	171,000
Purchase of shares					(5,684)
Purchase of shares (in shares)					383,000
Cash dividends ($0.08 per share)				(3,046)
Foreign currency translation adjustment, net of tax			(1,226)			(1,226)
Net income				5,395		5,395
Balance at Aug. 30, 2014	$ 570	$ 365,401	$ (3,799)	$ 301,179	$ (317,192)	$ 346,159
Balance (in shares) at Aug. 30, 2014	57,043,000				18,963,000	38,080,000