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Components of Net Deferred Tax Asset (Liability) (Detail) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Deferred Tax Assets: |  |
Allowance for loan losses | $ 75,605 | $ 73,835
Compensation and related benefit obligations | 27,877 | 31,112
Acquisition accounting and fair value adjustments on securities (including OTTI) | 14,455 | 13,970
Acquisition accounting and fair value adjustments on loans (including the FDIC loss share receivable) | 7,496 |
Non-accrual interest | 4,791 | 6,107
Restructuring and retirement of borrowed funds | 6,957 | 16,545
Net operating loss carryforwards | 5,664 | 16,675
Other | 18,351 | 19,723
Gross deferred tax assets | 161,196 | 177,967
Valuation allowance | 0 | 0
Deferred tax asset after valuation allowance | 161,196 | 177,967
Deferred tax asset after valuation allowance | 161,196 | 177,967
Deferred Tax Liabilities: |  |
Amortizable intangibles | (1,655) | (1,379)
Acquisition accounting and fair value adjustments on loans (including the FDIC loss share receivable) |  | (1,094)
Mortgage servicing rights | (65,975) | (53,370)
Premises and equipment | (19,310) | (20,120)
Prepaid pension cost | (30,962) | (27,056)
Leases | (65,214) | (50,658)
Other | (10,691) | (12,281)
Gross deferred tax liabilities | (193,807) | (165,958)
Gross deferred tax liabilities | (193,807) | (165,958)
Net deferred tax asset (liability) |  | $ 12,009
Net deferred tax liability | $ (32,611) |

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