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Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Assets: |  |
Deferred leasing costs, accumulated amortization | $ 151,698 | $ 146,125
Prepaid expenses and other assets, accumulated amortization | $ 21,154 | $ 20,017
Equity/Capital: |  |
Preferred Stock, par value (in dollars per share) | $ 0.01 | $ 0.01
Preferred Stock, authorized shares (in shares) | 50,000,000 | 50,000,000
Preferred Stock, liquidation preference (in dollars per share) | $ 1,000 | $ 1,000
Preferred Stock, shares issued (in shares) | 28,826 | 28,859
Preferred Stock, shares outstanding (in shares) | 28,826 | 28,859
Common Stock, par value (in dollars per share) | $ 0.01 | $ 0.01
Common Stock, authorized shares (in shares) | 200,000,000 | 200,000,000
Common Stock, shares issued (in shares) | 103,921,546 | 103,756,046
Common Stock, shares outstanding (in shares) | 103,921,546 | 103,756,046
Highwoods Realty Limited Partnership [Member] |  |
Assets: |  |
Deferred leasing costs, accumulated amortization | $ 151,698 | $ 146,125
Prepaid expenses and other assets, accumulated amortization | $ 21,154 | $ 20,017
Redeemable Operating Partnership Units: |  |
Redeemable Common Units, outstanding (in shares) | 2,838,725 | 2,723,703
Preferred Units liquidation preference (in dollars per share) | $ 1,000 | $ 1,000
Series A Preferred Units, issued (in shares) | 28,826 | 28,859
Series A Preferred Units, outstanding (in shares) | 28,826 | 28,859
Common Units: |  |
General partners' capital account, units outstanding (in shares) | 1,063,515 | 1,060,709
Limited partners' capital account, units outstanding (in shares) | 102,449,222 | 102,286,528

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