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CASH AND CASH EQUIVALENTS (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
Cash and cash equivalents
Total cash and cash equivalents	$ 203,540	$ 113,873	$ 21,985	$ 14,896
Cash
Cash and cash equivalents
Total cash and cash equivalents	75,638	110,973
Money market funds
Cash and cash equivalents
Total cash and cash equivalents	$ 127,902	$ 2,900

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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