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Noncontrolling Interests - Holders of Convertible Limited Partnership Units in the Operating Partnership - Additional Information (Detail)
12 Months Ended
Jun. 29, 2021
shares
Dec. 31, 2021
shares
Dec. 31, 2020
shares
Dec. 31, 2019
shares
Leasehold Interest Contributed In Contribution Agreement | Limited Partner        
Noncontrolling Interest [Line Items]        
Stock issued during period, shares, acquisitions 469,740      
Noncontrolling Interests        
Noncontrolling Interest [Line Items]        
Limited partnership units (in shares)   8,801,214    
Limited partnership units, conversion ratio   1    
Outstanding stock percent that should be acquired for rights to be exercised   39.90%    
Limited partnership units convertible to shares of common stock, eligible for conversion   540,000    
Fully converted partnership units and diluted weighted average shares outstanding   33,100,000 31,300,000 30,900,000
Partners capital account units placed In escrow (in shares)   700,000    
Saul Holdings Limited Partnership        
Noncontrolling Interest [Line Items]        
Percentage of ownership in operating partnership   71.90%    
Saul Holdings Limited Partnership | Noncontrolling Interests        
Noncontrolling Interest [Line Items]        
Percentage of ownership interest of noncontrolling interest   26.70%    
Limited partnership units, conversion ratio   1    
Third Party Investor        
Noncontrolling Interest [Line Items]        
Percentage of ownership interest of noncontrolling interest   1.40%