Investment Securities - Other information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) security	Dec. 31, 2018 USD ($) security
Investment Securities
Number of securities sold | security	12	0
Net gain (loss) on sale of securities	$ 10
Number of securities either matured or called | security	13	4
Net gain (loss) on securities either matured or called	$ 97	$ 0
Realized loss on equity securities	$ 9