Acquisitions Fair Value of Assets Acquired (Details) - Series of Individually Immaterial Business Acquisitions $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)
Business Acquisition [Line Items]
Land	$ 14,548
Land Improvements	100
Building	10,499
Other Assets	303
Total Assets Acquired	25,804
Other Liabilities	(240)
Cash paid, net of cash acquired	25,564
Leasehold Value
Business Acquisition [Line Items]
Intangibles	(24)
Lease in Place
Business Acquisition [Line Items]
Intangibles	327
Leasing Commission
Business Acquisition [Line Items]
Intangibles	$ 51
Land Improvements
Business Acquisition [Line Items]
Estimated useful life	5 years
Building
Business Acquisition [Line Items]
Estimated useful life	30 years