Allowance for Credit Losses - Summary of Activity in Allowance for Loan Losses (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss	$ 105,680	$ 85,376	$ 91,847	$ 30,616
Total allowance for credit losses
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss	103,266	84,394
Qualitative and forecast factor allowance
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss	70,777	59,855
Quantitative (Cohort) model allowance reserves
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss	32,489	24,539
Allowance for individually evaluated loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss	$ 2,414	$ 982