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Consolidated Statement of Capital (Parenthetical) - $ / shares
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Cash distribution declared, per common share (in dollars per share) $ 2.94 $ 2.52 $ 2.10
SL Green Operating Partnership      
Cash distribution declared, per common share (in dollars per share) $ 2.94 $ 2.52 $ 2.1