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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Restricted Cash and Cash Equivalents | $ 3,595 | $ 2,542
Deferred costs accumulated amortization | 110,158 | 108,381
Accumulated amortization of acquired lease intangible assets | 268,063 | 259,310
Accumulated accretion of acquired lease intangible liabilities | $ 144,682 | $ 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 | 169,620,627 | 167,571,218
Treasury stock, shares held at cost | 449,979 | 440,574
Exchangeable operating partnership units aggregate redemption value | $ 29,401 | $ 47,092
Partnership Interest [Member] |  |
Restricted Cash and Cash Equivalents | 3,595 | 2,542
Deferred costs accumulated amortization | 110,158 | 108,381
Accumulated amortization of acquired lease intangible assets | 268,063 | 259,310
Accumulated accretion of acquired lease intangible liabilities | $ 144,682 | $ 131,676
General partner units, outstanding | 169,620,627 | 167,571,218
Limited partner units, outstanding | 765,046 | 746,433

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