Revenue - Summary of Revenue from Tenant Construction Projects Disaggregated by Tenant Agency (Detail) - ASU 2014-09 [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	$ 2,765	$ 1,102	$ 5,075	$ 2,374
Department of Veteran Affairs ("VA") [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	1,699	203	2,632	302
U.S Joint Staff Command ("JSC") [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	651	164	1,253	456
Federal Bureau of Investigation ("FBI") [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	55	619	378	845
U.S. Coast Guard ("USCG") [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	62		209	33
Department of Transportation ("DOT") [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	16		136
Immigration and Customs Enforcement ("ICE") [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	40		111
The Judiciary of the U.S. Government ("JUD") [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	106		110	4
Federal Emergency Management Agency ("FEMA") [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	70		89
Customs and Border Protection ("CBP") [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	3	35	82	155
U.S. Citizenship and Immigration Services ("USCIS") [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	30		30	110
Bonneville Power Administration ("BPA") [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	14		14
National Archives and Records Administration (''NARA'') [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	13		13
Food And Drug Administration ("FDA") [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	2		11	204
Internal Revenue Service ("IRS") [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	1		4	33
Department of Labor ("DOL") [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	$ 3		$ 3
General Services Administration - Other [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income		6		6
National Park Services ("NPS") [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income		1		100
Drug Enforcement Agency (“DEA”) [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income		40		40
Occupational Safety and Health Administration ("OSHA") [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income		22		68
Patent and Trademark Office ("PTO") [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income		$ 12		14
Health Resources and Services Administration ("HRSA") [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income				$ 4