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Fair Value Measurements (Details 1) - USD ($) $ in Thousands | Jun. 30, 2015 | Dec. 31, 2014
--- | --- | ---
Assets: |  |  |
Marketable equity securities |  | $ 22,541 | $ 87,659
Liabilities: |  |  |
Interest rate swaps | [1] | 1,349 | 1,404
Fair Value Measurements, Recurring [Member] | Level 1 [Member] |  |  |
Assets: |  |  |
Marketable equity securities |  | $ 22,541 | $ 87,659
Liabilities: |  |  |
Interest rate swaps | [1] |  |
Fair Value Measurements, Recurring [Member] | Level 2 [Member] |  |  |
Assets: |  |  |
Marketable equity securities |  |  |
Liabilities: |  |  |
Interest rate swaps | [1] | $ 1,349 | $ 1,404
Fair Value Measurements, Recurring [Member] | Level 3 [Member] |  |  |
Assets: |  |  |
Marketable equity securities |  |  |
Liabilities: |  |  |
Interest rate swaps | [1] |  |
[1] | Included in Other liabilities on the Company's Condensed Consolidated Balance Sheets

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