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Securities, Unrealized Gains (Losses) Related to Equity Securities (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Gains (losses) on equity securities [Abstract]          
Net gains and (losses) recognized on equity securities $ 177 $ (69) $ (638) $ 87  
Less: Net gains and (losses) recognized during the period on equity securities sold during the period 0 0 0 0  
Unrealized gains and (losses) recognized on equity securities still held 177 (69) (638) 87  
Carrying amount of equity securities without readily determinable fair values 4,000   4,000   $ 4,000
Impairment adjustments of equity securities without readily determinable fair values 0 0 0 0  
Downward adjustments of equity securities without readily determinable fair values 0 0 0 0  
Upward adjustments of equity securities without readily determinable fair values $ 0 $ 0 $ 0 $ 0