Real Estate (Intangible Assets, Lease Liabilities, and Related Amortization) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Intangible lease liabilities (included in other liabilities):
Below-market in-place leases	$ 41,932		$ 41,932		$ 41,101
Less: accumulated amortization	(27,217)		(27,217)		(26,486)
Below-market in-place leases, net	14,715		14,715		14,615
Above-market in-place leases
Intangible lease assets (included in other assets):
Leases	15,389		15,389		15,474
Less: accumulated amortization	10,699		10,699		10,271
Leases, net	4,690		4,690		5,203
In-place leases
Intangible lease assets (included in other assets):
Leases	123,470		123,470		118,416
Less: accumulated amortization	72,510		72,510		68,695
Leases, net	50,960		50,960		$ 49,721
Intangible lease liabilities (included in other liabilities):
Amortization expense, in-place leases	1,840	$ 2,027	5,451	$ 6,364
Above-market and below-market in-place leases
Intangible lease liabilities (included in other liabilities):
Amortization expense, above- and below-market leases	$ 156	$ 301	$ 430	$ 711