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CASH, CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS - Summary of Cash, Cash Equivalents, 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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Mar. 31, 2014
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Dec. 31, 2013
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|---|---|---|---|---|
| Cash and cash equivalents: | ||||
| Cash | $ 58,964 | $ 73,495 | ||
| Cash equivalents: | ||||
| Commercial paper | 28,598 | 19,996 | ||
| Money market mutual funds | 121,463 | 88,568 | ||
| Total cash and cash equivalents | 209,025 | 182,059 | 167,908 | 343,637 |
| Short-term investments: | ||||
| Short-term investments | 129,895 | 148,383 | ||
| Total cash, cash equivalents, and short-term investments | 338,920 | 330,442 | ||
| Commercial paper | ||||
| Short-term investments: | ||||
| Short-term investments | $ 129,895 | $ 148,383 |