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Derivatives and Hedging Activities - Summary of Gross Presentation, Effects of Offsetting and a Net Presentation of Derivatives (Detail) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
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Derivatives Fair Value [Line Items] |  |
Gross Amounts of Recognized Assets, Offsetting of Derivative Assets | $ 800 | $ 1,088
Net Amounts of Assets presented in the Consolidated Balance Sheets, Offsetting of Derivative Assets | 800 | 1,088
Gross Amounts Not Offset in the Consolidated Balance Sheets, Derivative Assets, Net Amount |  | 1,088
Gross Amounts of Recognized Liabilities, Offsetting of Derivative Liabilities | 769 | 1,149
Net Amounts of Liabilities presented in the Consolidated Balance Sheets, Offsetting of Derivative Liabilities | 769 | 1,149
Gross Amounts Not Offset in the Consolidated Balance Sheets, Derivative Liabilities, Net Amount |  | (1)
Gross Amounts Not Offset in the Consolidated Balance Sheets, Derivative Liabilities, Cash Collateral Provided |  | 1,150
Derivative Liabilities, Financial Instruments |  |
Derivatives Fair Value [Line Items] |  |
Gross Amounts Not Offset in the Consolidated Balance Sheets, Derivative Liabilities, Net Amount | 769 |
Derivative Assets, Financial Instruments |  |
Derivatives Fair Value [Line Items] |  |
Gross Amounts Not Offset in the Consolidated Balance Sheets, Derivative Assets, Net Amount | 769 | $ 1,088
Derivative Assets, Cash Collateral Received |  |
Derivatives Fair Value [Line Items] |  |
Gross Amounts Not Offset in the Consolidated Balance Sheets, Derivative Assets, Net Amount | $ 31 |

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