Quarterly report pursuant to Section 13 or 15(d)

Derivatives and Hedging Activities - Effect of Derivative Financial Instruments that are Not Designated as Hedging Instruments on Income Statement (Detail)

v3.21.2
Derivatives and Hedging Activities - Effect of Derivative Financial Instruments that are Not Designated as Hedging Instruments on Income Statement (Detail) - Not Designated as Hedging Instrument - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Derivative Instruments Gain Loss [Line Items]        
Amount of Gain or (Loss) Recognized in Income on Derivative $ 7 $ (77) $ 92 $ 21
Interest Rate Products | Other Income        
Derivative Instruments Gain Loss [Line Items]        
Amount of Gain or (Loss) Recognized in Income on Derivative $ 7 $ (77) $ 92 $ 21