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Fair Value Measurements (Details 2) - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Assets: |  |
Marketable securities in deferred compensation plan | $ 4,257 | $ 3,868
Fair value measurement on a recurring basis |  |
Assets: |  |
Interest rate derivatives | 32 |
Total assets | 4,289 |
Liabilities: |  |
Deferred compensation plan liability | 4,257 |
Interest rate derivatives | 34,825 |
Total liabilities | 39,082 |
Fair value measurement on a recurring basis | Mutual funds |  |
Assets: |  |
Marketable securities in deferred compensation plan | 4,232 |
Fair value measurement on a recurring basis | Other |  |
Assets: |  |
Marketable securities in deferred compensation plan | 25 |
Fair value measurement on a recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Assets: |  |
Interest rate derivatives | 0 |
Total assets | 4,257 |
Liabilities: |  |
Deferred compensation plan liability | 0 |
Interest rate derivatives | 0 |
Total liabilities | 0 |
Fair value measurement on a recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Mutual funds |  |
Assets: |  |
Marketable securities in deferred compensation plan | 4,232 |
Fair value measurement on a recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other |  |
Assets: |  |
Marketable securities in deferred compensation plan | 25 |
Fair value measurement on a recurring basis | Significant Other Observable Inputs (Level 2) |  |
Assets: |  |
Interest rate derivatives | 32 |
Total assets | 32 |
Liabilities: |  |
Deferred compensation plan liability | 4,257 |
Interest rate derivatives | 34,825 |
Total liabilities | 39,082 |
Fair value measurement on a recurring basis | Significant Other Observable Inputs (Level 2) | Mutual funds |  |
Assets: |  |
Marketable securities in deferred compensation plan | 0 |
Fair value measurement on a recurring basis | Significant Other Observable Inputs (Level 2) | Other |  |
Assets: |  |
Marketable securities in deferred compensation plan | 0 |
Fair value measurement on a recurring basis | Significant Unobservable Inputs (Level 3) |  |
Assets: |  |
Interest rate derivatives | 0 |
Total assets | 0 |
Liabilities: |  |
Deferred compensation plan liability | 0 |
Interest rate derivatives | 0 |
Total liabilities | 0 |
Fair value measurement on a recurring basis | Significant Unobservable Inputs (Level 3) | Mutual funds |  |
Assets: |  |
Marketable securities in deferred compensation plan | 0 |
Fair value measurement on a recurring basis | Significant Unobservable Inputs (Level 3) | Other |  |
Assets: |  |
Marketable securities in deferred compensation plan | 0 |
Fair value measurement on a recurring basis | Corporate Office Properties, L.P. |  |
Assets: |  |
Interest rate derivatives | 32 |
Liabilities: |  |
Interest rate derivatives | 34,825 |
Fair value measurement on a recurring basis | Corporate Office Properties, L.P. | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Assets: |  |
Interest rate derivatives | 0 |
Liabilities: |  |
Interest rate derivatives | 0 |
Fair value measurement on a recurring basis | Corporate Office Properties, L.P. | Significant Other Observable Inputs (Level 2) |  |
Assets: |  |
Interest rate derivatives | 32 |
Liabilities: |  |
Interest rate derivatives | 34,825 |
Fair value measurement on a recurring basis | Corporate Office Properties, L.P. | Significant Unobservable Inputs (Level 3) |  |
Assets: |  |
Interest rate derivatives | 0 |
Liabilities: |  |
Interest rate derivatives | $ 0 |

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