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Pay vs Performance Disclosure - USD ($) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Pay vs Performance Disclosure |  |  |  |  |
Pay vs Performance Disclosure, Table |
|  |  |  |  |  |  |  |  |  | Value of Initial Fixed $100 Investment on January 1, 2020 Based On: |  |  |  |
Year |  | Summary Compensation Table Total for PEO (1) |  | Compensation Actually Paid to PEO (1) |  | Average Summary Compensation Table Total for Non-PEO NEOs (2) |  | Average Compensation Actually Paid to Non-PEO NEOs (2) |  | Saul Centers Total Stockholder Return (4) |  | Peer Group Total Stockholder Return (3) (4) |  | Net Income (in thousands) (4) |  |
2024 |  | $ | 1,384,835 |  |  | $ | 1,399,251 |  |  | $ | 1,099,961 |  |  | $ | 1,131,981 |  |  | $ | 98.23 |  |  | $ | 123.35 |  |  | $ | 67,703 |  |  |
2023 |  | 302,294 |  |  | 302,294 |  |  | 944,714 |  |  | 940,496 |  |  | 93.56 |  | 113.46 |  | 69,026 |  |  |
2022 |  | 293,174 |  |  | 293,174 |  |  | 896,356 |  |  | 802,676 |  |  | 91.04 |  | 99.78 |  | 65,392 |  |  |
2021 |  | 248,465 |  |  | 248,465 |  |  | 680,841 |  |  | 929,317 |  |  | 112.91 |  | 131.86 |  | 61,649 |  |  |
2020 |  | 193,906 |  |  | 193,906 |  |  | 706,527 |  |  | 540,224 |  |  | 63.94 |  | 92.05 |  | 50,316 |  |  |
Named Executive Officers, Footnote | Mr. B. Francis Saul II was our PEO for all years shown. Prior to 2024, all equity grants awarded to Mr. B. Francis Saul II vested immediately and there were no adjustments to the Summary Compensation Table total to arrive at CAP to our PEO.For 2020, our other NEOs included Messrs. Schneider, Netter, Pearson, and Collich. For 2021, our other NEOs included Messrs. Schneider, Pearson, Netter, Collich and Heard. For 2023 and 2022, our other NEOs included Messrs. Pearson, Netter, Collich and Heard. For 2024, our other NEOs included Messrs. Pearson, Collich, Heard, and Friedlis. |  |  |  |
Peer Group Issuers, Footnote | Peer Group TSR is calculated using the FTSE Nareit Equity Index, which is the index used for purposes of our performance graph in our Annual Report on Form 10-K for the year ended December 31, 2024. |  |  |  |
PEO Total Compensation Amount | $ 1,384,835 | $ 302,294 | $ 293,174 | $ 248,465 | $ 193,906
PEO Actually Paid Compensation Amount | $ 1,399,251 | 302,294 | 293,174 | 248,465 | 193,906
Adjustment To PEO Compensation, Footnote | The following table summarizes the adjustments made during each year to arrive at average CAP to the PEO during 2024, 2023, 2022, 2021, and 2020.
|  | PEO
Adjustments |  | 2024 |  | 2023 |  | 2022 |  | 2021 |  | 2020
Amounts reported under “Restricted Stock Awards” in Summary Compensation Table |  | $ | (1,133,766) |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Fair Value of Awards Granted in the Indicated Year and Unvested as of Year-End |  | 1,148,182 |  |  | — |  |  | — |  |  | — |  |  | — |
Change in Fair Value from Awards Granted in Prior Years that Remain Unvested as of Year-End |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Change in Fair Value from Awards Granted in Prior Years that Vested during the Year |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Increase based on Dividends or Other Earnings Paid During Year prior to Vesting Date of Award |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total Adjustments |  | $ | 14,416 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Non-PEO NEO Average Total Compensation Amount | $ 1,099,961 | 944,714 | 896,356 | 680,841 | 706,527
Non-PEO NEO Average Compensation Actually Paid Amount | $ 1,131,981 | 940,496 | 802,676 | 929,317 | 540,224
Adjustment to Non-PEO NEO Compensation Footnote | The following table summarizes the adjustments made during each year to arrive at average CAP to the other NEOs during 2024, 2023, 2022, 2021, and 2020.
|  | Average of Other NEOs
Adjustments |  | 2024 |  | 2023 |  | 2022 |  | 2021 |  | 2020
Amounts reported under “Restricted Stock Awards” in Summary Compensation Table |  | $ | (304,641) |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Amounts reported under “Option Awards” in Summary Compensation Table |  | — |  |  | (136,350) |  |  | (172,350) |  |  | (95,360) |  |  | (17,250) |
Fair Value of Awards Granted in the Indicated Year and Unvested as of Year-End |  | 308,567 |  |  | 203,625 |  |  | 138,825 |  |  | 156,800 |  |  | 29,438 |
Change in Fair Value from Awards Granted in Prior Years that Remain Unvested as of Year-End |  | 22,694 |  |  | (26,716) |  |  | (63,297) |  |  | 146,115 |  |  | (103,803) |
Change in Fair Value from Awards Granted in Prior Years that Vested during the Year |  | 5,400 |  |  | (44,777) |  |  | 3,142 |  |  | 40,921 |  |  | (74,688) |
Increase based on Dividends or Other Earnings Paid During Year prior to Vesting Date of Award |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total Adjustments |  | $ | 32,020 |  |  | $ | (4,218) |  |  | $ | (93,680) |  |  | $ | 248,476 |  |  | $ | (166,303) |
Compensation Actually Paid vs. Total Shareholder Return |  |  |  |  |
Compensation Actually Paid vs. Net Income |  |  |  |  |
Total Shareholder Return Vs Peer Group |  |  |  |  |
Total Shareholder Return Amount | $ 98.23 | 93.56 | 91.04 | 112.91 | 63.94
Peer Group Total Shareholder Return Amount | 123.35 | 113.46 | 99.78 | 131.86 | 92.05
Net Income (Loss) | $ 67,703,000 | 69,026,000 | 65,392,000 | 61,649,000 | 50,316,000
PEO Name | Mr. B. Francis Saul II |  |  |  |
Additional 402(v) Disclosure | The Company does not link CAP with net income, TSR, or any other financial performance measurement. The Compensation Committee believes that the annual salary, cash bonus, and options awarded to each of our NEOs during the periods presented reflected the scope of the role and responsibilities of the applicable position, individual performance and experience, and competitive market practices. The Compensation Committee believes that the annual salary, cash bonus, and options awarded to each of our NEOs maintain a level of total compensation that allows us to attract and retain executive officers who create and preserve sustainable stockholder value. |  |  |  |
PEO |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | $ 14,416 | 0 | 0 | 0 | 0
PEO | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 1,148,182 | 0 | 0 | 0 | 0
PEO | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 0 | 0 | 0 | 0 | 0
PEO | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 0 | 0 | 0 | 0 | 0
PEO | Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 0 | 0 | 0 | 0 | 0
PEO | Aggregate Grant Date Fair Value of Restrcited Stock Equity Award Amounts Reported in Summary Compensation Table [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | (1,133,766) | 0 | 0 | 0 | 0
Non-PEO NEO |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 32,020 | (4,218) | (93,680) | 248,476 | (166,303)
Non-PEO NEO | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 308,567 | 203,625 | 138,825 | 156,800 | 29,438
Non-PEO NEO | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 22,694 | (26,716) | (63,297) | 146,115 | (103,803)
Non-PEO NEO | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 5,400 | (44,777) | 3,142 | 40,921 | (74,688)
Non-PEO NEO | Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 0 | 0 | 0 | 0 | 0
Non-PEO NEO | Aggregate Grant Date Fair Value of Restrcited Stock Equity Award Amounts Reported in Summary Compensation Table [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | (304,641) | 0 | 0 | 0 | 0
Non-PEO NEO | Aggregate Grant Date Fair Value of Option Equity Award Amounts Reported in Summary Compensation Table [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | $ 0 | $ (136,350) | $ (172,350) | $ (95,360) | $ (17,250)

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