Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating expenses, paid to related parties	$ 12,643	$ 18,106	$ 17,823
SL Green Operating Partnership
Operating expenses, paid to related parties	$ 12,643	$ 18,106	$ 17,823