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CASH, CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS - Short-Term Investments and Marketable Securities (Detail) (USD $)
In Thousands, unless otherwise specified |
Mar. 31, 2015
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Dec. 31, 2014
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|---|---|---|
| Schedule Of Short Term Investments And Available For Sale Securities [Line Items] | ||
| Amortized Cost | $ 129,912 | $ 148,447 |
| Gross Unrealized Gains | 0 | 0 |
| Gross Unrealized Losses | 17 | 64 |
| Fair Value | 129,895 | 148,383 |
| Commercial Paper | ||
| Schedule Of Short Term Investments And Available For Sale Securities [Line Items] | ||
| Amortized Cost | 129,912 | 148,447 |
| Gross Unrealized Gains | 0 | 0 |
| Gross Unrealized Losses | 17 | 64 |
| Fair Value | $ 129,895 | $ 148,383 |