Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating expenses, paid to related parties	$ 18,106	$ 17,823	$ 21,400
SL Green Operating Partnership
Operating expenses, paid to related parties	$ 18,106	$ 17,823	$ 21,400