Investment Securities - Unrealized Gains (Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Investments, Debt and Equity Securities [Abstract]
Net (Loss) Gain on Equity Securities	$ (106)	$ (72)	$ 250	$ (552)
Less: Net (loss) gain recognized during the reporting period on equity securities sold during the period	0	0	0	0
Unrealized net (loss) gain recognized during the reporting period on equity securities still held at the reporting date	$ (106)	$ (72)	$ 250	$ (552)