Debt Securities Held-to-Maturity - Additional Information (Details) security in Millions	6 Months Ended
	Jun. 30, 2021 USD ($) security	Jun. 30, 2020 USD ($)	Dec. 31, 2020 security
Investments, Debt and Equity Securities [Abstract]
Held-to-maturity securities sold	$ 0	$ 0
Held-to-maturity securities pledged to secure borrowings and deposits	$ 6,400,000
Held-to-maturity securities unrealized loss position | security	0.0		0.0
Allowance for credit losses	$ 0
Accrued interest receivable associated with held-to-maturity securities	$ 19,400