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Securities, Gains and (Losses) on Equity Securities (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Gains (losses) on equity securities [Abstract]          
Net gains and (losses) recognized on equity securities $ 201 $ 177 $ 653 $ (638)  
Less: Net gains and (losses) recognized on equity securities sold during the period 0 0 0 0  
Unrealized gains and (losses) recognized on equity securities still held 201 177 653 $ (638)  
Equity Securities without Readily Determinable Fair Value, Annual Amount [Abstract]          
Carrying amount of equity securities without readily determinable fair values 1,000   $ 1,000   $ 2,000
Impairment adjustments of equity securities without readily determinable fair values 0 0      
Downward adjustments of equity securities without readily determinable fair values 0 0      
Upward adjustments of equity securities without readily determinable fair values $ 0 $ 0