Commitments and Contingencies - Summary of Distribution of Undisbursed Credit-related Commitments (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Undisbursed Credit Related Commitments [Line Items]
Other Commitment	$ 154,160	$ 86,504
Loan commitments
Undisbursed Credit Related Commitments [Line Items]
Other Commitment	147,889	75,740
Standby letters of credits
Undisbursed Credit Related Commitments [Line Items]
Letters of Credit Outstanding, Amount	5,514	9,212
Commercial letters of credit
Undisbursed Credit Related Commitments [Line Items]
Letters of Credit Outstanding, Amount	$ 757	$ 1,552