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Subsequent Events - Narrative (Details) - Subsequent Event $ / shares in Units, $ in Millions | Nov. 05, 2019 USD ($) a $ / shares shares | Oct. 17, 2019 $ / shares
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Series C Cumulative Redeemable Preferred Stock |  |
Subsequent Event [Line Items] |  |
Preferred stock gross redemption price (in dollars per share) |  | $ 25.00
Preferred stock net redemption price (in dollars per share) |  | $ 25.07638
BF Saul Real Estate Investment Trust | Land Contributed In Contribution Agreement |  |
Subsequent Event [Line Items] |  |
Area of land | a | 6.8 |
BF Saul Real Estate Investment Trust | Leasehold Interest Contributed In Contribution Agreement |  |
Subsequent Event [Line Items] |  |
Area of land | a | 1.3 |
Contribution Agreement |  |
Subsequent Event [Line Items] |  |
Number of partnership units issued in transaction (in shares) | shares | 1,416,071 |
Value of units issued (in dollars per share) | $ 56.00 |
Value assigned to units issued | $ | $ 79.3 |

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- Definition Real Estate, Equity Interests Issued Or Issuable, Value Assigned Per Share + References No definition available. + Details
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- Definition The price per share at which the preferred stock of an entity that has priority over common stock in the distribution of dividends and in the event of liquidation of the entity is redeemed or may be called at. The redemption features of this preferred stock are solely within the control of the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21488-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21564-112644 + Details
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