Fair Value Measurements - Narrative (Details) - Property
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6 Months Ended |
12 Months Ended |
Jun. 30, 2020 |
Dec. 31, 2019 |
| Measurement Input, Price Per Square Foot | Minimum | Impact of COVID-19 |
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|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Price per square foot, discount rate |
0.00%
|
|
| Measurement Input, Price Per Square Foot | Maximum | Impact of COVID-19 |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Price per square foot, discount rate |
10.00%
|
|
| Fair Value, Measurements, Nonrecurring |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Impairment of lease, expiration period (or less) |
60 days
|
|
| Number Of Properties Accounted For At Fair Value |
24
|
16
|
| Fair Value, Measurements, Nonrecurring | Fair Value Estimated Using Capitalization Rate | Measurement Input Capitalization Rate |
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
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| Number Of Properties Accounted For At Fair Value |
1
|
1
|
| Long Lived Assets Estimated Capitalization Rate Fair Value Disclosure |
10.06%
|
9.62%
|