Other Liabilities, Net - Summary of Other Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Jul. 18, 2017	Dec. 31, 2016
Schedule of Other Liabilities [Line Items]
Lease intangible liabilities	$ 44,917		$ 36,515
Accumulated amortization	(26,950)		(24,945)
Lease intangible liabilities, net	17,967		11,570
Prepaid rent	15,751		9,163
Lease assumption liabilities and accrued tenant incentives	50,866		14,907
Capital lease obligation	15,819		0
Security deposits	13,618		10,324
Ground lease deferred rent payable	3,730		3,331
Net deferred tax liability	8,202		0
Dividends payable	31,097		0
Other	4,227		192
Total other liabilities, net	$ 161,277		$ 49,487
JBG Companies
Schedule of Other Liabilities [Line Items]
Lease assumption liabilities		$ (43,388)