Quarterly report pursuant to Section 13 or 15(d)

Consolidated Balance Sheets (Unaudited) (Parenthetical)

v2.4.1.9
Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $)
Nov. 30, 2014
Feb. 28, 2014
Class A Common Stock [Member]    
Common Stock, par value $ 0.01us-gaap_CommonStockParOrStatedValuePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
$ 0.01us-gaap_CommonStockParOrStatedValuePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
Common Stock, shares authorized 322,000,000us-gaap_CommonStockSharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
322,000,000us-gaap_CommonStockSharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
Common Stock, shares issued 249,748,158us-gaap_CommonStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
248,264,944us-gaap_CommonStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
Treasury Stock, shares at cost 79,741,318us-gaap_TreasuryStockShares
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
80,225,575us-gaap_TreasuryStockShares
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
Class B Convertible Common Stock [Member]    
Common Stock, par value $ 0.01us-gaap_CommonStockParOrStatedValuePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassBMember
$ 0.01us-gaap_CommonStockParOrStatedValuePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassBMember
Common Stock, shares authorized 30,000,000us-gaap_CommonStockSharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassBMember
30,000,000us-gaap_CommonStockSharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassBMember
Common Stock, shares issued 28,391,913us-gaap_CommonStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassBMember
28,436,565us-gaap_CommonStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassBMember
Treasury Stock, shares at cost 5,005,800us-gaap_TreasuryStockShares
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassBMember
5,005,800us-gaap_TreasuryStockShares
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassBMember