Schedule of Goodwill (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Goodwill [Line Items]
Goodwill Gross, Beginning balance	$ 316,858	$ 331,884
Goodwill Gross, additions	0	500
Goodwill Gross, allocated to Provision for impairment	0	0
Goodwill Gross, allocated to Properties held for sale	(1,283)	(1,159)
Goodwill, ending balance	312,860	316,858
Goodwill, Accumulated Impairment Losses, Beginning balance	(2,715)	0
Goodwill Accumulated Impairment Losses, additions	0	0
Goodwill Accumulated Impairment Losses, allocated to Provision for impairment	(963)	(12,628)
Goodwill Accumulated Impairment Losses, allocated to Properties held for sale	0	0
Goodwill, Accumulated Impairment Losses, Ending balance	(963)	(2,715)
Goodwill, Beginning balance	314,143	331,884
Goodwill additions	0	500
Goodwill allocated to Provision for impairment	(963)	(12,628)
Goodwill allocated to Properties held for sale	(1,283)	(1,159)
Goodwill, Ending balance	311,897	314,143
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Goodwill [Line Items]
Goodwill Gross, allocated to Provision for impairment	(1,779)	(9,913)
Goodwill Gross, allocated to Gain on sale of real estate	(936)	(4,454)
Goodwill Accumulated Impairment Losses, allocated to Provision for impairment	1,779	9,913
Goodwill Accumulated Impairment Losses, allocated to Gain on sale of real estate	936	0
Goodwill allocated to Provision for impairment	0	0
Goodwill allocated to Gain on sale of real estate	$ 0	$ (4,454)