MARKETABLE SECURITIES	12 Months Ended
MARKETABLE SECURITIES	Dec. 31, 2011
Marketable Securities [Abstract]
Marketable Securities	Marketable Securities The Company held no marketable securities as of December 31, 2011. As of December 31, 2010, marketable securities consisted of one municipal student loan-backed auction rate security with a cost and estimated fair value of $3.0 million. This security was sold in January 2011 for $3.0 million. Realized losses from sales and maturities of marketable securities are included in interest and other income, net, in the consolidated statements of operations. There were no realized gains or losses from the sales and maturities of marketable securities for the year ended December 31, 2011. For the year ended December 31, 2010, the Company recognized realized losses of $2.8 million from the sales of marketable securities. Realized gains and losses were immaterial for the year ended December 31, 2009. The Company recognizes realized gains and losses upon sale or maturity of marketable securities using the specific identification method.

- Definition

Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets.

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