v2.4.0.8

STOCKHOLDERS' EQUITY (Details) (USD $) | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Mar. 31, 2013 | Jun. 30, 2013 | Jun. 30, 2013 | Dec. 31, 2012
Equity [Abstract] |  |  |  |
At-the-market equity offering program, authorized amount | $ 750,000,000 |  |  |
At-the-market equity offering program, shares issued during period |  |  | 1,128,700 |
At-the-market equity offering program, proceeds from sale of stock during period |  | 77,300,000 | 82,400,000 |
At-the-market equity offering program, payments of stock issuance costs during period |  |  | 1,300,000 |
At-the-market equity offering program, remaining authorized offering amount |  | 666,300,000 | 666,300,000 |
Accumulated Other Comprehensive Income |  |  |  |
Foreign currency translation |  | 18,628,000 | 18,628,000 | 23,441,000
Unrealized gain on marketable debt securities |  | 0 | 0 | 807,000
Other |  | 1,124,000 | 1,124,000 | (894,000)
Total accumulated other comprehensive income |  | $ 19,752,000 | $ 19,752,000 | $ 23,354,000

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