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v3.20.2

Commitments and Contingencies (Details) ft² in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2020 USD ($) ft² | Dec. 31, 2019 USD ($)
Property Subject to or Available for Operating Lease [Line Items] |  |
Debt, net | $ 1,919,511,000 | $ 2,144,418,000
4040 Wilson Venture |  |
Property Subject to or Available for Operating Lease [Line Items] |  |
Debt, net | 150,000,000.0 |
Guarantees, maximum exposure amount | 41,300,000 |
Unconsolidated Real Estate Ventures |  |
Property Subject to or Available for Operating Lease [Line Items] |  |
Real estate ventures aggregate indebtedness | $ 842,200,000 |
Radnor PA Property |  |
Property Subject to or Available for Operating Lease [Line Items] |  |
Rentable area (in square feet) | ft² | 170 |
Payments to acquire buildings | $ 20,300,000 |
Payments for deposits on real estate acquisitions | 1,000,000.0 |
One and Two Commerce Square | Preferred Equity Investment |  |
Property Subject to or Available for Operating Lease [Line Items] |  |
Other commitments | 20,000,000.0 |
Drexel Square |  |
Property Subject to or Available for Operating Lease [Line Items] |  |
Other commitments | 7,700,000 |
Estimated potential additional contribution obligation | 2,600,000 |
Mortgage Lenders |  |
Property Subject to or Available for Operating Lease [Line Items] |  |
Associated letter of credit | $ 0 |

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