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Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Capitalized interest | $ 3,586 | $ 3,527 | $ 12,835
BRANDYWINE OPERATING PARTNERSHIP, L.P. |  |  |
Capitalized interest | $ 3,586 | $ 3,527 | $ 12,835

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