Tenant and Other Receivables, Net (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Tenant and Other Receivables, Net [Abstract]
Tenants	$ 31,362,000	$ 30,672,000
Third-party real estate services	12,443,000	8,954,000
Other	9,463,000	12,992,000
Allowance for doubtful accounts	(6,700,000)	(5,884,000)
Total tenant and other receivables, net	46,568,000	46,734,000
Bad debt expense	$ 3,298,000	$ 3,807,000	$ 750,600