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Segment Reporting (Details 1) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012
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Segment Reporting [Abstract] |  |  |  |  |  |
Assets, Net | $ 2,571,728 |  | $ 2,595,408 |  |  |
Cash and cash equivalents | 269,133 | 272,932 | 206,690 | 249,531 | 331,311 | 125,440
Short term investments | 47,642 |  | 0 |  |  |
Other assets | 79,019 |  | 83,880 |  |  |
TOTAL ASSETS | $ 2,967,522 |  | $ 2,885,978 |  |  |

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