Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Off-Balance-Sheet, Credit Loss, Liability, Change in Method, Credit Loss Expense (Reversal)	$ 1,800
Lessee, Operating Lease, Liability, Payments, Due	8,100	$ 8,300
Significant change in expected future minimum lease payments since year end	0
Consumer Loan [Member]
Off-Balance-Sheet, Credit Loss, Liability, Change in Method, Credit Loss Expense (Reversal)	1,600
Commercial mortgage [Member]
Off-Balance-Sheet, Credit Loss, Liability, Change in Method, Credit Loss Expense (Reversal)	211
Property, Plant and Equipment Member
Operating Lease, Right-of-Use Asset	278,400		$ 280,500
Other Liabilities [Member]
Operating Lease, Liability	$ 315,000		$ 316,400