XML 49 R38.htm IDEA: XBRL DOCUMENT v3.21.2
Investment Securities - Unrealized Gain (Loss) on Investments (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Investments, Debt and Equity Securities [Abstract]        
Unrealized gain (loss) on investment securities held at the end of the period $ 3,988 $ 1,148 $ 4,007 $ 246