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Federal, State and Local Taxes - Components of Net Deferred Tax Asset (Liability) (Detail) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Deferred Tax Assets: |  |
Allowance for credit losses on loans and leases | $ 53,260 | $ 40,584
Compensation and related benefit obligations | 20,760 | 19,401
Non-accrual interest | 672 | 624
Net operating loss carryforwards | 5,682 | 19,750
Other | 17,240 | 12,169
Gross deferred tax assets | 97,614 | 92,528
Deferred tax asset after valuation allowance | 97,614 | 92,528
Deferred Tax Liabilities: |  |
Amortizable intangibles | (2,775) | (2,480)
Acquisition accounting and fair value adjustments on securities (including OTTI) | (12,407) | (9,742)
Premises and equipment | (6,385) | (7,578)
Prepaid pension cost | (24,412) | (22,739)
Fair value adjustments on loans | (92,340) | (3,209)
Leases | (370,305) | (237,429)
Other | (8,880) | (10,782)
Gross deferred tax liabilities | (517,504) | (293,959)
Net deferred tax liability | $ (419,890) | $ (201,431)

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