Real Estate and Intangibles - Fair Values of Assets Acquired and Liabilities Assumed (Detail) - Operating Properties and Land Parcel Acquired [Member] - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
ICE Dallas, HSI Orlando, ICE Orlando, Northrop Grumman Dayton, Northrop Grumman Aurora, IRS Ogden, Cary, NC [Member]
Business Acquisition [Line Items]
Land	$ 41,591
Building	104,618
Acquired tenant improvements	$ 9,794
Investment, Type [Extensible Enumeration]	us-gaap:RealEstateInvestmentMember
Total real estate	$ 156,003
Total intangible assets	34,394
Total intangible liabilities	(5,469)
Contingent consideration	0
Contingent consideration	0
Purchase price	184,928
CA - Anaheim, DHS - Atlanta and JUD - Newport News
Business Acquisition [Line Items]
Land		$ 8,407
Building		37,328
Acquired tenant improvements		$ 4,283
Investment, Type [Extensible Enumeration]		us-gaap:RealEstateInvestmentMember
Total real estate		$ 50,018
Total intangible assets		13,457
Contingent consideration		41
Contingent consideration		(388)
Purchase price		63,128
Leases, Acquired-in-Place [Member] | ICE Dallas, HSI Orlando, ICE Orlando, Northrop Grumman Dayton, Northrop Grumman Aurora, IRS Ogden, Cary, NC [Member]
Business Acquisition [Line Items]
Total intangible assets	24,552
Leases, Acquired-in-Place [Member] | CA - Anaheim, DHS - Atlanta and JUD - Newport News
Business Acquisition [Line Items]
Total intangible assets		9,538
Acquired Leasing Commissions [Member] | ICE Dallas, HSI Orlando, ICE Orlando, Northrop Grumman Dayton, Northrop Grumman Aurora, IRS Ogden, Cary, NC [Member]
Business Acquisition [Line Items]
Total intangible assets	9,842
Acquired Leasing Commissions [Member] | CA - Anaheim, DHS - Atlanta and JUD - Newport News
Business Acquisition [Line Items]
Total intangible assets		$ 3,919
Below Market Leases [Member] | ICE Dallas, HSI Orlando, ICE Orlando, Northrop Grumman Dayton, Northrop Grumman Aurora, IRS Ogden, Cary, NC [Member]
Business Acquisition [Line Items]
Total intangible liabilities	$ (5,469)