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
	Mar. 31, 2021	Mar. 31, 2020
Investments Debt And Equity Securities [Abstract]
Net gains (losses) recognized on equity securities during the period	$ 88	$ (141)
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	$ 88	$ (135)