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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2015
Income Taxes [Abstract] |
Components of income tax expense attributable to operations | The significant components of income tax expense attributable to operations are:
|  | Years ended December 31, |
(In thousands) |  | 2015 |  |  | 2014 |  |  | 2013 |
Current |  |  |  |  |  |  |  |  |
Federal |  | $ | 32,871 |  |  | $ | 26,059 |  |  | $ | 23,536 |
State |  |  | 4,329 |  |  |  | 2,823 |  |  |  | 2,316 |
|  |  | 37,200 |  |  |  | 28,882 |  |  |  | 25,852 |
Deferred |  |  |  |  |  |  |  |  |  |  |  |
Federal |  |  | 2,521 |  |  |  | 6,648 |  |  |  | 2,334 |
State |  |  | 482 |  |  |  | 1,699 |  |  |  | 10 |
|  |  | 3,003 |  |  |  | 8,347 |  |  |  | 2,344 |
Total income tax expense |  | $ | 40,203 |  |  | $ | 37,229 |  |  | $ | 28,196 |
Components of deferred tax assets and liabilities | The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities are as follows:
|  | December 31, |
(In thousands) |  | 2015 |  |  | 2014 |
Deferred tax assets |  |  |  |  |  |
Allowance for loan losses |  | $ | 24,090 |  |  | $ | 25,689 |
Deferred compensation |  |  | 10,023 |  |  |  | 8,744 |
Postretirement benefit obligation |  |  | 2,988 |  |  |  | 2,377 |
Fair value adjustments from acquisitions |  |  | 2,543 |  |  |  | - |
Unrealized losses on securities |  |  | 589 |  |  |  | - |
Accrued liabilities |  |  | 2,889 |  |  |  | 1,778 |
Stock-based compensation expense |  |  | 5,394 |  |  |  | 6,457 |
Equipment leasing |  |  | 476 |  |  |  | 1,416 |
Other |  |  | 1,477 |  |  |  | 1,325 |
Total deferred tax assets |  |  | 50,469 |  |  |  | 47,786 |
Deferred tax liabilities |  |  |  |  |  |  |  |
Pension benefits |  |  | 11,908 |  |  |  | 12,192 |
Fair value adjustments from acquisitions |  |  | - |  |  |  | 1,243 |
Unrealized gains on securities |  |  | - |  |  |  | 1,331 |
Premises and equipment, primarily due to accelerated depreciation |  |  | 2,444 |  |  |  | 2,491 |
Deferred loan costs |  |  | 1,591 |  |  |  | 1,460 |
Intangible amortization |  |  | 19,082 |  |  |  | 14,162 |
Other |  |  | 504 |  |  |  | 390 |
Total deferred tax liabilities |  |  | 35,529 |  |  |  | 33,269 |
Net deferred tax asset at year-end |  |  | 14,940 |  |  |  | 14,517 |
Net deferred tax asset at beginning of year |  |  | 14,517 |  |  |  | 21,789 |
Increase (Decrease) in net deferred tax asset |  | $ | 423 |  |  | $ | (7,272 | )
Reconciliation of the provision for income taxes to the amount computed by applying the federal statutory rate | The following is a reconciliation of the provision for income taxes to the amount computed by applying the applicable Federal statutory rate of 35 % to income before taxes:
|  | Years ended December 31 |
(In thousands) |  | 2015 |  |  | 2014 |  |  | 2013 |
Federal income tax at statutory rate |  | $ | 40,820 |  |  | $ | 39,306 |  |  | $ | 31,482 |
Tax exempt income |  |  | (2,037 | ) |  |  | (2,250 | ) |  |  | (2,433 | )
Net increase in CSV of life insurance |  |  | (1,373 | ) |  |  | (1,734 | ) |  |  | (1,166 | )
Low income housing tax credits |  |  | (939 | ) |  |  | (880 | ) |  |  | (819 | )
State taxes, net of federal tax benefit |  |  | 3,127 |  |  |  | 2,939 |  |  |  | 1,512 |
Other, net |  |  | 605 |  |  |  | (152 | ) |  |  | (380 | )
Income tax expense |  | $ | 40,203 |  |  | $ | 37,229 |  |  | $ | 28,196 |

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 + Details
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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 + Details
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