Acquired Intangibles Assets and Liabilities - Amortization (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Acquired Intangible Assets and Liabilities
Amortization of acquired above and below-market leases, net	$ 300	$ 100
Amortization of all other identified intangible assets	4,700	$ 4,500
Estimated amortization of acquired favorable and unfavorable leases Rental Expense
Total	2,065		$ 2,119
Finite Lived Intangible Assets Liabilities Amortization
2017 (April - December)	163
2018	216
2019	216
2020	216
2021	216
Thereafter	1,038
Above Market Lease Net	2,065		2,119
Estimated amortization of all other identified intangible assets
Net Carrying Value	124,507		129,754
Acquired favorable leases
Estimated amortization of all other identified intangible assets
Net Carrying Value	3,267		$ 3,639
Acquired favorable leases
Estimated amortization of all other identified intangible assets
2017 (April - December)	768
2018	682
2019	479
2020	647
2021	46
Thereafter	33
Net Carrying Value	2,655
All other identified intangible assets
Estimated amortization of all other identified intangible assets
2017 (April - December)	14,110
2018	15,383
2019	12,773
2020	12,187
2021	10,946
Thereafter	55,841
Net Carrying Value	$ 121,240