Real Estate (Intangible Assets, Lease Liabilities, and Related Amortization) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Intangible lease liabilities (included in other liabilities):
Below-market in-place leases	$ 42,633		$ 41,767
Less: accumulated amortization	(26,351)		(26,135)
Below-market in-place leases, net	16,282		15,632
Above-market in-place leases
Intangible lease assets (included in other assets):
Leases	15,845		15,754
Less: accumulated amortization	(10,090)		(9,897)
Leases, net	5,755		5,857
In-place leases
Intangible lease assets (included in other assets):
Leases	121,674		119,846
Less: accumulated amortization	(66,048)		(64,918)
Leases, net	55,626		$ 54,928
Intangible lease liabilities (included in other liabilities):
Amortization expense, in-place leases	2,395	$ 2,244
Above-market and below-market in-place leases
Intangible lease liabilities (included in other liabilities):
Amortization expense, above- and below-market leases	$ 220	$ 228