Consolidated Statements of Cash Flows (Unaudited) (Parentheticals) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Capitalized interest	$ 31,243	$ 21,297
Cash and cash equivalents and restricted cash included in the spin-off of JBG SMITH Properties (excluding The Bartlett financing proceeds, transaction costs and other mortgage adjustments)	416,237	0
JBGS
Cash and cash equivalents and restricted cash included in the spin-off of JBG SMITH Properties (excluding The Bartlett financing proceeds, transaction costs and other mortgage adjustments)	(275,000)
Vornado Realty L.P.
Capitalized interest	31,243	21,297
Cash and cash equivalents and restricted cash included in the spin-off of JBG SMITH Properties (excluding The Bartlett financing proceeds, transaction costs and other mortgage adjustments)	416,237	$ 0
Vornado Realty L.P. | JBGS
Cash and cash equivalents and restricted cash included in the spin-off of JBG SMITH Properties (excluding The Bartlett financing proceeds, transaction costs and other mortgage adjustments)	$ (275,000)