CONSOLIDATED STATEMENTS OF SHAREHOLDER'S EQUITY (USD $) In Thousands, unless otherwise specified	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income [Member]	Total
Balance at Feb. 28, 2009	$ 2,642	$ 325,596	$ 124,642	$ (101,199)	$ (2,873)	$ 348,808
Balance (in shares) at Feb. 28, 2009	26,416			(4,495)
Comprehensive income (loss):
Net income (loss)	0	0	(7,978)	0	0	(7,978)
Other comprehensive income (loss):
Change in pension liability	0	0	0	0	(237)	(237)
Change in unrealized loss on investments	0	0	0	0	3,459	3,459
Foreign currency translation adjustment	0	0	0	0	2,427	2,427
Total other comprehensive income (loss)						5,649
Total comprehensive income (loss)						(2,329)
Issuance of common stock for business acquisition	11	2,306	0	0	0	2,317
Issuance of common stock for business acquisition (in shares)	110
Stock options exercised	25	4,218	0	0	0	4,243
Stock options exercised (in shares)	253
Excess tax benefit from employee stock plans	0	(574)	0	0	0	(574)
Stock-based compensation	10	9,413	0	0	0	9,423
Stock-based compensation (in shares)	104
Balance at Feb. 28, 2010	2,688	340,959	116,664	(101,199)	2,776	361,888
Balance (in shares) at Feb. 28, 2010	26,883			(4,495)
Comprehensive income (loss):
Net income (loss)	0	0	10,627	0	0	10,627
Other comprehensive income (loss):
Change in pension liability	0	0	0	0	(373)	(373)
Change in unrealized loss on investments	0	0	0	0	1,712	1,712
Foreign currency translation adjustment	0	0	0	0	4,373	4,373
Total other comprehensive income (loss)						5,712
Total comprehensive income (loss)						16,339
Issuance of common stock for business acquisition	0	0	0	0	0	0
Issuance of common stock for business acquisition (in shares)	2
Stock options exercised	52	9,739	0	0	0	9,791
Stock options exercised (in shares)	519
Excess tax benefit from employee stock plans	0	(1,345)	0	0	0	(1,345)
Stock-based compensation	9	10,437	0	0	0	10,446
Stock-based compensation (in shares)	83
Purchases of treasury stock	0	0	0	(212)	0	(212)
Purchases of treasury stock (in shares)				(8)
Balance at Feb. 28, 2011	2,749	359,790	127,291	(101,411)	8,488	396,907
Balance (in shares) at Feb. 28, 2011	27,487			(4,503)
Comprehensive income (loss):
Net income (loss)	0	0	10,662	0	0	10,662
Other comprehensive income (loss):
Change in pension liability	0	0	0	0	(395)	(395)
Change in unrealized loss on investments	0	0	0	0	(182)	(182)
Foreign currency translation adjustment	0	0	0	0	(2,427)	(2,427)
Total other comprehensive income (loss)						(3,004)
Total comprehensive income (loss)						7,658
Issuance of common stock for business acquisition	2	518	0	0	0	520
Issuance of common stock for business acquisition (in shares)	21
Stock options exercised	44	7,656	0	0	0	7,700
Stock options exercised (in shares)	440
Excess tax benefit from employee stock plans	0	(289)	0	0	0	(289)
Stock-based compensation	18	12,826	0	0	0	12,844
Stock-based compensation (in shares)	179
Purchases of treasury stock	0	0	0	(30,973)	0	(30,973)
Purchases of treasury stock (in shares)				(1,378)
Balance at Feb. 29, 2012	$ 2,813	$ 380,501	$ 137,953	$ (132,384)	$ 5,484	$ 394,367
Balance (in shares) at Feb. 29, 2012	28,127			(5,881)