Revenue - Summary of Revenue from Tenant Construction Projects Disaggregated by Tenant Agency (Detail) - ASU 2014-09 [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	$ 1,102	$ 1,909	$ 2,375	$ 5,195
U.S Joint Staff Command ("JSC") [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	758	5	928	410
Department of Veterans Affairs ("VA") [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	255	830	681	2,021
Food And Drug Administration ("FDA") [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	14	0	544	62
Federal Bureau of Investigation ("FBI") [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	56	560	154	1,353
Internal Revenue Service ("IRS") [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	3	49	34	113
Department of the Treasury ("TREAS") [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	9	4	11	29
U.S. Citizenship and Immigration Services ("USCIS") [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	0	0	11	43
Patent and Trademark Office ("PTO") [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	5	0	5	0
Department of Transportation ("DOT") [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	0	24	4	81
The Judiciary of the U.S. Government ("JUD") [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	0	28	1	66
National Weather Service (NWS) [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	1	5	1	5
United States Forest Service ("USFS")
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	1	0	1	0
General Services Administration - Other [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	0	5	0	155
U.S. Coast Guard ("USCG") [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	0	172	0	462
Homeland Security Investigations ("HSI") [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	0	11	0	105
State of California ("CA") [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	0	0	0	41
Drug Enforcement Administration ("DEA") [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	0	97	0	130
Immigration and Customs Enforcement ("ICE") [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	0	115	0	115
Environmental Protection Agency ("EPA") [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	0	15	0	15
Department of Homeland Security ("DHS") [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	0	9	0	9
Customs and Border Protection ("CBP") [Member]
Disaggregation Of Revenue [Line Items]
Tenant Construction Project Income	$ 0	$ (20)	$ 0	$ (20)