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Derivative Instruments and Hedging Activity - Fair Value (Details) - Interest rate swap - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
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Other Assets [Member] |  |
Derivatives designated as cash flow hedges |  |
Interest Rate Cash Flow Hedge Asset at Fair Value | $ 283 | $ 572
Accounts Payable and Accrued Liabilities And Other Liabilities [Member] |  |
Derivatives designated as cash flow hedges |  |
Interest Rate Cash Flow Hedge Liability at Fair Value | $ 18,369 | $ 7,943

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