SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION
Encumbrances	$ 97,100
Initial Cost
Land	151,727
Building and Improvements	451,040
Net Improvements (Write-Offs) Since Acquisition	57,646
Gross Amount at Which Carried
Land	151,727
Building and Improvements	508,686
Investments in real estate	660,413	$ 642,702
Accumulated Depreciation	158,407	144,718	$ 131,165
Other disclosures
Federal tax cost basis (unaudited)	714,300
Line of Credit | 2022 credit facility term loan
Other disclosures
Outstanding balance	56,230	$ 0
Office Building | 3601 S Congress Avenue Austin, TX
Initial Cost
Land	9,569
Building and Improvements	18,593
Net Improvements (Write-Offs) Since Acquisition	14,584
Gross Amount at Which Carried
Land	9,569
Building and Improvements	33,177
Investments in real estate	42,746
Accumulated Depreciation	8,985
Office Building | 1 Kaiser Plaza Oakland, CA
SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION
Encumbrances	97,100
Initial Cost
Land	9,261
Building and Improvements	113,619
Net Improvements (Write-Offs) Since Acquisition	19,058
Gross Amount at Which Carried
Land	9,261
Building and Improvements	132,677
Investments in real estate	141,938
Accumulated Depreciation	56,435
Office Building | 2 Kaiser Plaza Parking Lot Oakland, CA
Initial Cost
Land	10,931
Building and Improvements	110
Net Improvements (Write-Offs) Since Acquisition	3,665
Gross Amount at Which Carried
Land	10,931
Building and Improvements	3,775
Investments in real estate	14,706
Accumulated Depreciation	0
Office Building | 11600 Wilshire Blvd Los Angeles, CA
Initial Cost
Land	3,477
Building and Improvements	18,522
Net Improvements (Write-Offs) Since Acquisition	2,449
Gross Amount at Which Carried
Land	3,477
Building and Improvements	20,971
Investments in real estate	24,448
Accumulated Depreciation	7,267
Office Building | 11620 Wilshire Blvd Los Angeles, CA
Initial Cost
Land	7,672
Building and Improvements	51,999
Net Improvements (Write-Offs) Since Acquisition	6,989
Gross Amount at Which Carried
Land	7,672
Building and Improvements	58,988
Investments in real estate	66,660
Accumulated Depreciation	19,721
Office Building | 4750 Wilshire Blvd Los Angeles, CA
Initial Cost
Land	16,633
Building and Improvements	28,985
Net Improvements (Write-Offs) Since Acquisition	6,533
Gross Amount at Which Carried
Land	16,633
Building and Improvements	35,518
Investments in real estate	52,151
Accumulated Depreciation	7,476
Office Building | Lindblade Media Center Los Angeles, CA
Initial Cost
Land	6,342
Building and Improvements	11,568
Net Improvements (Write-Offs) Since Acquisition	491
Gross Amount at Which Carried
Land	6,342
Building and Improvements	12,059
Investments in real estate	18,401
Accumulated Depreciation	2,658
Office Building | 1037 N Sycamore Los Angeles, CA
Initial Cost
Land	1,839
Building and Improvements	1,094
Net Improvements (Write-Offs) Since Acquisition	113
Gross Amount at Which Carried
Land	1,839
Building and Improvements	1,207
Investments in real estate	3,046
Accumulated Depreciation	45
Office Building | 1130 Howard Street San Francisco, CA
Initial Cost
Land	8,290
Building and Improvements	10,480
Net Improvements (Write-Offs) Since Acquisition	(45)
Gross Amount at Which Carried
Land	8,290
Building and Improvements	10,435
Investments in real estate	18,725
Accumulated Depreciation	1,421
Office Building | 9460 Wilshire Boulevard Los Angeles, CA
Initial Cost
Land	52,199
Building and Improvements	76,730
Net Improvements (Write-Offs) Since Acquisition	2,250
Gross Amount at Which Carried
Land	52,199
Building and Improvements	78,980
Investments in real estate	131,179
Accumulated Depreciation	10,437
Office Building | 1021 East 7th Street, Austin, TX
Initial Cost
Land	4,976
Building and Improvements	733
Net Improvements (Write-Offs) Since Acquisition	0
Gross Amount at Which Carried
Land	4,976
Building and Improvements	733
Investments in real estate	5,709
Accumulated Depreciation	221
Office Building | 3101 S Western Avenue Los Angeles, CA
Initial Cost
Land	2,279
Building and Improvements	0
Net Improvements (Write-Offs) Since Acquisition	620
Gross Amount at Which Carried
Land	2,279
Building and Improvements	620
Investments in real estate	2,899
Accumulated Depreciation	0
Office Building | 3022 S Western Avenue Los Angeles, CA
Initial Cost
Land	5,637
Building and Improvements	156
Net Improvements (Write-Offs) Since Acquisition	439
Gross Amount at Which Carried
Land	5,637
Building and Improvements	595
Investments in real estate	6,232
Accumulated Depreciation	5
Office Building | 1007 E 7th Street Austin, TX
Initial Cost
Land	1,866
Building and Improvements	6
Net Improvements (Write-Offs) Since Acquisition	138
Gross Amount at Which Carried
Land	1,866
Building and Improvements	144
Investments in real estate	2,010
Accumulated Depreciation	23
Office Building | 3109 S Western Avenue Los Angeles, CA
Initial Cost
Land	709
Building and Improvements	2
Net Improvements (Write-Offs) Since Acquisition	23
Gross Amount at Which Carried
Land	709
Building and Improvements	25
Investments in real estate	734
Accumulated Depreciation	0
Hotel | Sheraton Grand Hotel Sacramento, CA
Initial Cost
Land	3,497
Building and Improvements	107,447
Net Improvements (Write-Offs) Since Acquisition	67
Gross Amount at Which Carried
Land	3,497
Building and Improvements	107,514
Investments in real estate	111,011
Accumulated Depreciation	39,566
Hotel | Sheraton Grand Hotel Parking & Retail Sacramento, CA
SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION
Encumbrances	0
Initial Cost
Land	6,550
Building and Improvements	10,996
Net Improvements (Write-Offs) Since Acquisition	272
Gross Amount at Which Carried
Land	6,550
Building and Improvements	11,268
Investments in real estate	17,818
Accumulated Depreciation	$ 4,147