CASH, CASH EQUIVALENTS AND INVESTMENTS (Details) - USD ($) $ in Thousands | May 31, 2018 | Feb. 28, 2018 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Adjusted Cost | | $ 185,027 | $ 160,602 |
Unrealized Gains (Losses) | | 722 | 1,351 |
Fair Value | | 185,749 | 161,953 |
Cash and Cash Equivalents [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair Value | | 169,509 | 132,603 |
Short Term Marketable Securities [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair Value | | 9,261 | 23,400 |
Other Assets [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair Value | | 6,979 | 5,950 |
Cash [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Adjusted Cost | | 81,851 | 51,529 |
Unrealized Gains (Losses) | | | |
Fair Value | | 81,851 | 51,529 |
Cash [Member] | Cash and Cash Equivalents [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair Value | | 81,851 | 51,529 |
Cash [Member] | Short Term Marketable Securities [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair Value | | | |
Cash [Member] | Other Assets [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair Value | | | |
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Adjusted Cost | | 8,405 | 9,034 |
Unrealized Gains (Losses) | | | |
Fair Value | | 8,405 | 9,034 |
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member] | Cash and Cash Equivalents [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair Value | | 8,405 | 9,034 |
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member] | Short Term Marketable Securities [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair Value | | | |
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member] | Other Assets [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair Value | | | |
Mutual Fund [Member] | Fair Value, Inputs, Level 1 [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Adjusted Cost | [1] | 5,946 | 4,920 |
Unrealized Gains (Losses) | [1] | 720 | 721 |
Fair Value | [1] | 6,666 | 5,641 |
Mutual Fund [Member] | Fair Value, Inputs, Level 1 [Member] | Cash and Cash Equivalents [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair Value | [1] | | |
Mutual Fund [Member] | Fair Value, Inputs, Level 1 [Member] | Short Term Marketable Securities [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair Value | [1] | | |
Mutual Fund [Member] | Fair Value, Inputs, Level 1 [Member] | Other Assets [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair Value | [1] | 6,666 | 5,641 |
Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Adjusted Cost | | 309 | 2,175 |
Unrealized Gains (Losses) | | 4 | 643 |
Fair Value | | 313 | 2,818 |
Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Cash and Cash Equivalents [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair Value | | | |
Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Short Term Marketable Securities [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair Value | | | 2,509 |
Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Other Assets [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair Value | | 313 | 309 |
Repurchase Agreements [Member] | Fair Value, Inputs, Level 2 [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Adjusted Cost | | 74,500 | 57,500 |
Unrealized Gains (Losses) | | | |
Fair Value | | 74,500 | 57,500 |
Repurchase Agreements [Member] | Fair Value, Inputs, Level 2 [Member] | Cash and Cash Equivalents [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair Value | | 74,500 | 57,500 |
Repurchase Agreements [Member] | Fair Value, Inputs, Level 2 [Member] | Short Term Marketable Securities [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair Value | | | |
Repurchase Agreements [Member] | Fair Value, Inputs, Level 2 [Member] | Other Assets [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair Value | | | |
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Adjusted Cost | | 14,016 | 35,444 |
Unrealized Gains (Losses) | | (2) | (13) |
Fair Value | | 14,014 | 35,431 |
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Cash and Cash Equivalents [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair Value | | 4,753 | 14,540 |
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Short Term Marketable Securities [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair Value | | 9,261 | 20,891 |
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Other Assets [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Fair Value | | | |
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[1] | Amounts represent various equities, bond and money market mutual funds that are held in a “Rabbi Trust” and are restricted for payment obligations to non-qualified deferred compensation plan participants. | |