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Components of Net Deferred Tax Asset (Liability) (Detail) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Deferred Tax Assets: |  |
Allowance for loan losses | $ 45,611 | $ 46,239
Compensation and related benefit obligations | 19,693 | 13,010
Acquisition accounting and fair value adjustments on securities (including OTTI) | 6,728 | 0
Non-accrual interest | 431 | 818
Restructuring and retirement of borrowed funds | 0 | 1,105
Net operating loss carryforwards | 0 | 2,967
Other | 11,349 | 15,953
Gross deferred tax assets | 83,812 | 80,092
Valuation allowance | 0 | 0
Deferred tax asset after valuation allowance | 83,812 | 80,092
Deferred Tax Liabilities: |  |
Amortizable intangibles | (2,263) | (1,704)
Acquisition accounting and fair value adjustments on securities (including OTTI) | 0 | (17,090)
Undistributed earnings of subsidiaries | 0 | (19,003)
Mortgage servicing rights | (223) | (1,794)
Premises and equipment | (11,242) | (12,907)
Prepaid pension cost | (19,135) | (24,324)
Leases | (115,259) | (78,682)
Other | (14,800) | (9,385)
Gross deferred tax liabilities | (162,922) | (164,889)
Net deferred tax liability | $ (79,110) | $ (84,797)

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