Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023	Jan. 01, 2023	Dec. 31, 2022
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for credit losses	$ 38,849	$ 34,196	$ 37,160		$ 28,511
Increase in allowance for credit losses	4,300
Unfunded loan commitments	3,400			$ 3,400
Increase in deferred tax assets	1,600
Interest income	50,128	42,925
Interest expense	21,756	$ 10,324
Discount from loans to allowance for credit losses				1,700
Decrease to Retained Earnings	187,638		$ 183,788
Cumulative Effect, Period of Adoption, Adjustment [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Decrease to Retained Earnings	$ (6,100)			(6,100)
Consumer Loan [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Period past due for accrued interest receivable	90 days
Revisions
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Interest income	$ 1,386
Interest expense	$ 1,386
ASU 2016-13 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]	true
Change in Accounting Principle, Accounting Standards Update, Adoption Date	Jan. 01, 2023
Allowance for credit losses					$ 897
Unfunded loan commitments				3,386
ASU 2016-13 [Member] | PCD Loans [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for credit losses				$ 1,668
ASU 2017-04 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]	true
Change in Accounting Principle, Accounting Standards Update, Adoption Date	Jan. 01, 2023
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false]	true
ASU 2022-02 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]	true
Change in Accounting Principle, Accounting Standards Update, Adoption Date	Jan. 01, 2023
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false]	true