Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Lessee, Operating Lease, Liability, Payments, Due	$ 8,400	$ 8,000	$ 16,400	$ 16,100
Significant change in expected future minimum lease payments since year end			0
Premises and Equipment
Operating Lease, Right-of-Use Asset	278,300		278,300		$ 281,400
Other Liabilities [Member]
Operating Lease, Liability	$ 310,500		$ 310,500		$ 313,400