Acquisitions and Sales (Allocation of the Fair Value of Assets Acquired and Liabilities Assumed as of the Acquisition Date) (Details) - USD ($) $ in Thousands	Apr. 23, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Acquisitions and Sales [Abstract]
Land	$ 1,743	$ 1,743		$ 9,363
Buildings and improvements	8,640	8,640	$ 445	14,341
Construction in Progress	29,902	61,514	$ 114,283	$ 103,334
Acquired intangibles (In-place lease & above market lease)	2,911
Deferred costs	906
Other assets	128	$ 128
Net Working Capital	554
Total identifiable assets acquired	44,784
Acquired below market lease	284
Total liabilities assumed	284
Net identifiable assets acquired	$ 44,500
Buildings and improvements weighted avg remaining useful life (in years)	24 years
Acquired intangibles weighted avg remaining useful life (in years)	3 years
Deferred costs weighted avg remaining useful life (in years)	3 years
Other assets weighted avg remaining useful life (in years)	3 years
Acquired below market lease weighted avg remaining useful life (in years)	3 years