Intangible Lease Liabilities, Net (Schedule of Intangible Lease Liabilities, Net) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Intangible Lease Liabilities, Net [Abstract]
Below-market leases, net of accumulated amortization of $16,869 and $16,031, respectively (with a weighted average remaining life of 16.9 years and 17.1 years, respectively)	$ 43,536	$ 44,374
Ground leasehold liabilities, net of accumulated amortization of $332 and $301, respectively (with a weighted average remaining life of 42.0 years and 42.2 years, respectively)	4,993	5,024
Total intangible lease liabilities, net	48,529	49,398
Below-market leases, accumulated amortization	$ 16,869	$ 16,031
Below-market leases, weighted average remaining life	16 years 10 months 24 days	17 years 1 month 6 days
Ground leasehold liabilities, accumulated amortization	$ 332	$ 301
Ground leasehold liabilities, weighted average remaining life	42 years	42 years 2 months 12 days
Intangible lease liabilities, weighted average remaining life	19 years 6 months	19 years 7 months 6 days