Investment Securities (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	6 Months Ended		12 Months Ended
	Aug. 31, 2011	Aug. 31, 2012	Aug. 31, 2011	Feb. 29, 2012		Feb. 28, 2011	Feb. 28, 2010
Gain (Loss) on Investments [Line Items]
Equity Method Investment, Ownership Percentage		20.00%
Trading Securities, Fair Value Disclosure		$ 3,406		$ 3,447
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities	(877)		(1,177)	1,225		1,600	1,000
Long Term Investments, Unrealized Holding Gain (Loss)		9		3
Cost Method Investments		2,375
Cost Method Investment, Additional Loan In		250
Cost Method Investment, Owndership Percentage		16.00%
Available-for-sale Securities, Fair Value Disclosure		9		3
Other investment at cost		9,977		9,652	[1]
Long Term Investments, Cost Basis		13,383		13,099
Investments, Fair Value Disclosure		13,392		13,102
Deferred Compensation, Share-based Payments [Member]
Gain (Loss) on Investments [Line Items]
Trading Securities, Fair Value Disclosure		3,406		3,447
Trading Securities, Change in Unrealized Holding Gain (Loss)		0		0
Trading Securities, Cost		3,406		3,447
Held-to-maturity Securities [Member]
Gain (Loss) on Investments [Line Items]
Held-to-maturity Securities, Amortized Cost before Other than Temporary Impairment		7,602		7,545
Held-to-maturity Securities, Unrecognized Holding Gain (Loss)		0		0
Held-to-maturity Securities, Fair Value		7,602		7,545
Categories of Investments, Marketable Securities, Trading Securities [Member]
Gain (Loss) on Investments [Line Items]
Marketable Securities, Cost Basis		11,008		10,992
Marketable Securities, Unrealized Holding Gain (Loss		9		3
Marketable Securities		11,017		10,995
Other Long-term Investments [Member]
Gain (Loss) on Investments [Line Items]
Other investment at cost		2,375		2,107
Other Long Term Investment, Cost Basis		2,375		2,107
Other Long Term Investment, Unrealized Holding Gain (Loss)		0		0
Cellstar [Member] | Available-for-sale Securities [Member]
Gain (Loss) on Investments [Line Items]
Available-for-sale Securities, Amortized Cost Basis		0		0
Available-for-sale Securities, Gross Unrealized Gains(Losses)		9		3
Available-for-sale Securities, Fair Value Disclosure		9		3
Bliss-tel [Member]
Gain (Loss) on Investments [Line Items]
Available-for-sale Securities		0		0
Investment Owned, Balance, Shares		36,250,000
Investment Owned, Warrants Expired		22,500,000
Bliss-tel [Member] | Available-for-sale Securities [Member]
Gain (Loss) on Investments [Line Items]
Available-for-sale Securities, Amortized Cost Basis		0		0
Available-for-sale Securities, Gross Unrealized Gains(Losses)		0		0
Available-for-sale Securities, Fair Value Disclosure		$ 0		$ 0

[1] There were no events or changes in circumstances that occurred to indicate a significant adverse effect on the cost of these investments.