SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 4) (USD $)	12 Months Ended
	Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2011
Goodwill, intangible and other long-lived assets and impairments
Non-cash impairment charges			$ 2,161,000
Non-cash impairment charges after tax			2,100,000
Economic useful lives and amortization of intangible assets
Intangible asset amortization	22,400,000	20,069,000	9,888,000
Goodwill deductible for tax purposes	$ 0
Minimum
Economic useful lives and amortization of intangible assets
Amortization period	2 years
Maximum
Economic useful lives and amortization of intangible assets
Amortization period	30 years
Patents
Economic useful lives and amortization of intangible assets
Amortization period	14 years