Securities - Additional Information (Details) $ in Thousands	Mar. 31, 2021 USD ($) security	Dec. 31, 2020 USD ($) security
Debt and Equity Securities, FV-NI [Line Items]
Number of securities holdings | security	0	0
Shareholders' equity percentage (greater than)	10.00%	10.00%
Collateral Pledged
Debt and Equity Securities, FV-NI [Line Items]
Debt securities, trading, restricted | $	$ 380,495	$ 453,407