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Marketable Securities | 12 Months Ended
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Dec. 31, 2012
Marketable Securities [Abstract] |
Marketable Securities [Text Block] | 5. MARKETABLE SECURITIES As of December 31, 2012, we own 535,265 Macerich co mmon shares, or approximately 0.39% of its outstanding common shares. These shares were received as part of the consideration for the sale of Kings Plaza and have an economic basis of $56.05 per share, or $30,000,000 in the aggregate. As of December 31, 2012, these shares have an aggregate fair value of $31,206,000, based on Macerich's closing share price of $58.30 per share at December 31, 2012. These shares are included in “marketable securities” on our consolidated balance sheet and are classified as available-for-sale. Avail able-for-sale securities are presented at fair value. Unrealized g ains and losses resulting from the mark-to-market of these securities are included in “other comprehensive income” and are recognized in earnings only upon the sale of the securities. Other comprehensive income includes a $1,206,000 unrealized gain for the year ended December 31, 2012.

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