Schedule of Repurchase Agreements Obligation by Type of Collateral Pledged (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements	$ 19,563	$ 89,944
Gross Amount of Recognized Liabilities for Repurchase Agreements in Note 11. "Offsetting of Assets and Liabilities"	19,563	89,944
Amounts Related to Agreements Not Included in Offsetting Disclosure in Note 11. "Offsetting of Assets and Liabilities"	0	0
Asset-backed Securities
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements		0
Loans
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements	19,563	89,944
Overnight and Continuous
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements		0
Overnight and Continuous | Asset-backed Securities
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements		0
Overnight and Continuous | Loans
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements	0	0
Up to 30 Days
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements		70,776
Up to 30 Days | Asset-backed Securities
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements		0
Up to 30 Days | Loans
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements	19,563	70,776
30 - 90 Days
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements		0
30 - 90 Days | Asset-backed Securities
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements		0
30 - 90 Days | Loans
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements	0	0
Greater than 90 Days
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements		19,168
Greater than 90 Days | Asset-backed Securities
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements		0
Greater than 90 Days | Loans
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements	$ 0	$ 19,168