Real Estate Summary of Real Estate Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Real Estate Properties [Line Items]
Construction in progress	$ 139,098	$ 91,047
Total Real estate, at cost	3,529,371	3,246,874
Accumulated depreciation	(847,390)	(754,140)
Net real estate	2,681,981	2,492,734
Total Retail
Real Estate Properties [Line Items]
Net real estate	591,107	607,918
Total Office
Real Estate Properties [Line Items]
Net real estate	1,536,212	1,317,107
Total Multifamily
Real Estate Properties [Line Items]
Net real estate	381,315	389,804
Total Mixed-Use
Real Estate Properties [Line Items]
Net real estate	173,347	177,905
Real Estate Investment
Real Estate Properties [Line Items]
Land	687,582	628,557
Buildings	2,320,332	2,184,934
Land improvements	72,064	69,049
Tenant improvements	310,525	276,639
Furniture, fixtures, and equipment	39,556	36,436
Construction in progress	99,312	51,259
Total Real estate, at cost	3,529,371	3,246,874
Accumulated depreciation	(847,390)	(754,140)
Net real estate	2,681,981	2,492,734
Real Estate Investment \| Total Retail
Real Estate Properties [Line Items]
Land	254,016	254,016
Buildings	527,262	526,522
Land improvements	47,425	47,425
Tenant improvements	89,520	88,326
Furniture, fixtures, and equipment	1,098	1,069
Construction in progress	7,160	5,170
Total Real estate, at cost	926,481	922,528
Accumulated depreciation	(335,374)	(314,610)
Net real estate	591,107	607,918
Real Estate Investment \| Total Office
Real Estate Properties [Line Items]
Land	284,263	225,238
Buildings	1,270,131	1,137,711
Land improvements	14,269	11,672
Tenant improvements	218,639	186,423
Furniture, fixtures, and equipment	5,003	3,236
Construction in progress	87,340	43,595
Total Real estate, at cost	1,879,645	1,607,875
Accumulated depreciation	(343,433)	(290,768)
Net real estate	1,536,212	1,317,107
Real Estate Investment \| Total Multifamily
Real Estate Properties [Line Items]
Land	72,668	72,668
Buildings	393,713	392,224
Land improvements	7,764	7,346
Tenant improvements	0	0
Furniture, fixtures, and equipment	18,039	16,480
Construction in progress	4,448	1,831
Total Real estate, at cost	496,632	490,549
Accumulated depreciation	(115,317)	(100,745)
Net real estate	381,315	389,804
Real Estate Investment \| Total Mixed-Use
Real Estate Properties [Line Items]
Land	76,635	76,635
Buildings	129,226	128,477
Land improvements	2,606	2,606
Tenant improvements	2,366	1,890
Furniture, fixtures, and equipment	15,416	15,651
Construction in progress	364	663
Total Real estate, at cost	226,613	225,922
Accumulated depreciation	(53,266)	(48,017)
Net real estate	$ 173,347	$ 177,905

Amount before accumulated depreciation of building structures held for productive use including addition, improvement, or renovation to the structure, including, but not limited to, interior masonry, interior flooring, electrical, and plumbing.

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Amount before accumulated deprecation and depletion of additions or improvements to real estate held for productive use. Examples include, but are not limited to, walkways, driveways, fences, and parking lots.

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Carrying amount as of the balance sheet date of improvements having a life longer than one year that were made for the benefit of one or more tenants.

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