Property Acquisitions - 2016 Acquisitions (Details) - 183 Broadway - USD ($) $ in Thousands	1 Months Ended
	Mar. 31, 2016	Mar. 31, 2017
Recognized Identifiable Assets Acquired and Liabilities Assumed
Land		$ 5,799
Building and building leasehold		23,431
Above-market lease value		0
Acquired in-place leases		773
Other assets, net of other liabilities		20
Assets acquired		30,023
Mark-to-market assumed debt		0
Below-market lease value		(1,523)
Derivatives		0
Liabilities assumed		(1,523)
Purchase price		$ 28,500
Net consideration funded by us at closing, excluding consideration financed by debt	$ 28,500
Equity and/or debt investment held	0
Debt assumed	$ 0