Real Estate (Intangible Assets, Lease Liabilities, and Related Amortization) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Intangible lease liabilities (included in other liabilities):
Below-market in-place leases	$ 42,333		$ 42,333		$ 41,767
Less: accumulated amortization	(26,431)		(26,431)		(26,135)
Below-market in-place leases, net	15,902		15,902		15,632
Amortization expense, above- and below-market leases	190	$ 173
Amortization expense, in-place leases	1,942	$ 1,798
Above-market in-place leases
Intangible lease assets (included in other assets):
Leases	15,845		15,845		15,754
Less: accumulated amortization	(10,280)		(10,280)		(9,897)
Leases, net	5,565		5,565		5,857
In-place leases
Intangible lease assets (included in other assets):
Leases	121,323		121,323		119,846
Less: accumulated amortization	(67,640)		(67,640)		(64,918)
Leases, net	$ 53,683		53,683		$ 54,928
Intangible lease liabilities (included in other liabilities):
Amortization expense, in-place leases			4,337	$ 4,042
Above-market and below-market in-place leases
Intangible lease liabilities (included in other liabilities):
Amortization expense, above- and below-market leases			$ 410	$ 401