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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Restricted Cash and Cash Equivalent | $ 4,325 | $ 2,542
Deferred costs accumulated amortization | 113,650 | 108,381
Accumulated amortization of acquired lease intangible assets | 279,139 | 259,310
Accumulated accretion of acquired lease intangible liabilities | $ 145,513 | $ 131,676
Common stock, par value per share | $ 0.01 | $ 0.01
Common stock, shares authorized | 220,000,000 | 220,000,000
Common stock, shares issued | 169,677,302 | 167,571,218
Treasury stock, shares held at cost | 469,860 | 440,574
Exchangeable operating partnership units aggregate redemption value | $ 29,087 | $ 47,092
Partnership Interest [Member] |  |
Restricted Cash and Cash Equivalent | 4,325 | 2,542
Deferred costs accumulated amortization | 113,650 | 108,381
Accumulated amortization of acquired lease intangible assets | 279,139 | 259,310
Accumulated accretion of acquired lease intangible liabilities | $ 145,513 | $ 131,676
General partner units, outstanding | 169,677,302 | 167,571,218
Limited partner units, outstanding | 765,046 | 746,433

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