Description of Business and Summary of Significant Accounting Policies Investment Securities Table (Details) (USD $) In Thousands, unless otherwise specified	Feb. 28, 2015	Feb. 28, 2014
Gain (Loss) on Investments [Line Items]
Marketable Securities, Cost Basis	$ 4,786	$ 11,874
Marketable Securities, Unrealized Holding Gain (Loss	15	3
Investments, Fair Value Disclosure	4,801	11,877
Held-to-maturity Securities [Member]
Gain (Loss) on Investments [Line Items]
Held-to-maturity Securities, Amortized Cost before Other than Temporary Impairment	275	7,640
Held-to-maturity Securities, Unrecognized Holding Gain (Loss)	0	0
Held-to-maturity Securities, Fair Value	275	7,640
Deferred Compensation, Share-based Payments [Member]
Gain (Loss) on Investments [Line Items]
Trading Securities, Cost	4,511	4,234
Trading Liabilities, Fair Value Disclosure	4,511	4,234
Trading Securities, Holding Gain (Loss)	0	0
Available-for-sale Securities [Member]
Gain (Loss) on Investments [Line Items]
Investments, Fair Value Disclosure	15	3
Available-for-sale Securities [Member] | Cellstar [Member]
Gain (Loss) on Investments [Line Items]
Available-for-sale Securities, Amortized Cost Basis	0	0
Available-for-sale Securities, Unrealized Gains (Losses)	15	3
Investments, Fair Value Disclosure	15	3
Other Long-term Investments [Member]
Gain (Loss) on Investments [Line Items]
Other Long Term Investment, Cost Basis	7,887	2,225
Other Long Term Investment, Unrealized Holding Gain (Loss)	0	0
Other investment at cost	7,887	2,225
Investments [Domain]
Gain (Loss) on Investments [Line Items]
Long Term Investments, Cost Basis	12,673	14,099
Long Term Investments, Unrealized Holding Gain (Loss)	15	3
Investments, Fair Value Disclosure	$ 12,688	$ 14,102