XML 110 R92.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
INCOME TAXES (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Current expense [Abstract]      
Federal $ 31,343 $ 34,330 $ 22,599
State 854 1,029 1,265
Total current expense 32,197 35,359 23,864
Deferred (benefit) expense [Abstract]      
Federal 10,946 4,675 (4,657)
State 1,644 1,592 169
Total deferred (benefit) expense 12,590 6,267 (4,488)
Income tax expense 44,787 41,626 19,376
Effective Income Tax Rate Reconciliation, Amount [Abstract]      
Income taxes computed at federal statutory rate on income before income taxes (21% in 2019 and 2018; 35% in 2017) 51,001 44,986 40,657
Benefit from tax-exempt income (5,964) (4,499) (3,427)
Tax credits (10,075) (5,439) (16,806)
Tax rate reduction impact 0 0 (8,191)
Basis reduction on tax credit 738 0 4,599
Tax benefit of equity compensation (140) (565) (1,449)
State income taxes, net of federal tax benefit 1,973 2,070 932
Affordable housing investments 5,825 4,725 2,798
Other 1,429 348 263
Income tax expense 44,787 41,626 19,376
Deferred tax assets [Abstract]      
Allowance for loan and lease losses 13,011 12,782  
Fair value adjustments on business combinations 6,470 11,199  
Deferred compensation 228 392  
Postretirement benefits other than pension liability 666 676  
Accrued stock-based compensation 1,296 1,145  
Other real estate owned write-downs 162 118  
Interest on nonaccrual loans 548 1,160  
Accrued expenses 4,708 5,808  
Net unrealized losses on investment securities and derivatives 0 3,221  
State net operating loss 2,792 3,119  
Federal tax credit carryforwards 0 873  
Other 816 425  
Total deferred tax assets 45,503 40,918  
Deferred tax asset, Leasing liability 14,806 0  
Deferred tax liabilities [Abstract]      
Tax depreciation greater than book depreciation (10,970) (9,530)  
FHLB and FRB stock (4,043) (4,044)  
Mortgage-servicing rights (2,435) (2,285)  
Leasing activities (7,349) (3,881)  
Retirement obligations 8,511 6,614  
Intangible assets (11,647) (12,310)  
Deferred loan fees and costs (1,100) (131)  
Prepaid expenses (623) (582)  
Limited partnership investments 2,249 2,367  
Unrealized gains on investment securities (11,359) 0  
Foreign exchange deferred income (2,845) 0  
Deferred tax liability, right of use asset (13,354) 0  
Other (2,048) (1,867)  
Deferred Tax Liabilities, Gross (78,533) (43,611)  
Total deferred tax liabilities (33,030) (2,693)  
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract]      
Balance at beginning of year 3,735 3,735  
Decrease resulting from settlements (729) 0  
Balance at end of year $ 3,006 $ 3,735 $ 3,735
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 21.00% 21.00% 35.00%
Deferred Tax Assets Operating Loss Carryforwards State And Local Acquired $ 3,600 $ 3,900  
Deferred taxes, business combination, valuation allowance 0 0  
Retained Earnings For Which No Deferred Income Tax Liability Has Been Recognized   16,100  
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Bad Debt Reserve for Tax Purposes of Qualified Lender   3,400  
Unrecognized tax benefits affecting income tax rate 2,400 2,900  
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense $ 0 $ 0