Securities - Schedule of Net Gains and Losses on Equity Investments Recognized in Earnings and Portion of Unrealized Gains and Losses for Period that Relates to Equity Investments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Investments Debt And Equity Securities [Abstract]
Net gains (losses) recognized on equity securities during the period	$ 20	$ 112	$ (126)	$ 81
Less: Net losses realized on the sale of equity securities during the period			6
Unrealized gains (losses) recognized on equity securities held at reporting date	$ 20	$ 112	$ (120)	$ 81