Noncontrolling Interests - Holders of Convertible Limited Partnership Units in the Operating Partnership - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2022 shares	Dec. 31, 2021 shares	Dec. 31, 2020 shares
Noncontrolling Interests
Noncontrolling Interest [Line Items]
Limited partnership units (in shares)	8,827,873
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	411,000
Fully converted partnership units and diluted weighted average shares outstanding	34,000,000	33,100,000	31,300,000
Partners capital account units placed In escrow (in shares)	708,035
Saul Holdings Limited Partnership
Noncontrolling Interest [Line Items]
Percentage of ownership in operating partnership	72.00%
Saul Holdings Limited Partnership | Noncontrolling Interests
Noncontrolling Interest [Line Items]
Percentage of ownership interest of noncontrolling interest	26.60%
Limited partnership units, conversion ratio	1
Third Party Investor
Noncontrolling Interest [Line Items]
Percentage of ownership interest of noncontrolling interest	1.40%