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Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Detail) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Income Tax Disclosure [Abstract] |  |
Lease liabilities under operating leases | $ 67,608 | $ 65,815
Net unrealized loss on securities available for sale and transferred securities | 349,237 | 0
Allowance for credit losses | 60,137 | 62,819
Net actuarial loss on defined benefit post-retirement benefit plans | 9,172 | 8,743
Stock-based compensation | 6,622 | 6,989
Bonus accrual | 11,204 | 7,506
Deferred loan and lease origination fees | 3,675 | 3,118
Other | 6,109 | 3,834
Total gross deferred tax assets | 513,764 | 158,824
Net unrealized gain on securities available for sale and transferred securities | 0 | (101,067)
Right-of-use assets under operating leases | (60,651) | (59,415)
Premises and equipment | (45,647) | (49,645)
Intangible assets | (17,732) | (16,595)
Defined benefit post-retirement benefit plans | (12,730) | (11,027)
Other | (2,601) | (2,323)
Total gross deferred tax liabilities | (139,361) | (240,072)
Deferred Tax Assets, Net | $ 374,403 |
Deferred Tax Liabilities, Net |  | $ (81,248)

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