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INCOME TAXES: (Tables) | 12 Months Ended
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Dec. 31, 2012
Income Tax Disclosure [Abstract] |
Income Tax Expense | Income tax expense is summarized as follows:
(Dollar amounts in thousands) |  | 2012 |  |  | 2011 |  |  | 2010 |
Federal: |  |  |  |  |  |  |  |  |  |  |  |
Currently payable |  | $ | 12,074 |  |  | $ | 11,872 |  |  | $ | 15,582 |
Deferred |  |  | (455 | ) |  |  | 311 |  |  |  | (4,850 | )
|  |  | 11,619 |  |  |  | 12,183 |  |  |  | 10,732 |
State: |  |  |  |  |  |  |  |  |  |  |  |
Currently payable |  |  | 1,887 |  |  |  | 1,901 |  |  |  | 2,325 |
Deferred |  |  | 312 |  |  |  | 313 |  |  |  | (1,090 | )
|  |  | 2,199 |  |  |  | 2,214 |  |  |  | 1,235 |
TOTAL |  | $ | 13,818 |  |  | $ | 14,397 |  |  | $ | 11,967 |
Reconciliation of Income Tax Expense | The reconciliation of income tax expense with the amount computed by applying the statutory federal income tax rate of 35% to income before income taxes is summarized as follows:
(Dollar amounts in thousands) |  | 2012 |  |  | 2011 |  |  | 2010 |
Federal income taxes computed at the statutory rate |  | $ | 16,320 |  |  | $ | 18,057 |  |  | $ | 14,004 |
Add (deduct) tax effect of: |  |  |  |  |  |  |  |  |  |  |  |
Tax exempt income |  |  | (3,864 | ) |  |  | (3,875 | ) |  |  | (3,400 | )
ESOP dividend deduction |  |  | (258 | ) |  |  | (1,085 | ) |  |  | - |
State tax, net of federal benefit |  |  | 1,444 |  |  |  | 1,439 |  |  |  | 803 |
Affordable housing credits |  |  | (148 | ) |  |  | (86 | ) |  |  | - |
Other, net |  |  | 324 |  |  |  | (53 | ) |  |  | 560 |
TOTAL |  | $ | 13,818 |  |  | $ | 14,397 |  |  | $ | 11,967 |
Schedule of Deferred Tax Assets and Liabilities | The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and liabilities at December 31, 2012 and 2011, are as follows:
(Dollar amounts in thousands) |  | 2012 |  |  | 2011 |
Deferred tax assets: |  |  |  |  |  |  |  |
Other than temporary impairment |  | $ | 5,951 |  |  | $ | 6,068 |
Net unrealized losses on retirement plans |  |  | 13,612 |  |  |  | 15,166 |
Loan losses provision |  |  | 8,606 |  |  |  | 7,803 |
Deferred compensation |  |  | 7,729 |  |  |  | 8,087 |
Compensated absences |  |  | 888 |  |  |  | 759 |
Post-retirement benefits |  |  | 2,040 |  |  |  | 2,016 |
Deferred loss on acquisition |  |  | 136 |  |  |  | 187 |
Other |  |  | 2,104 |  |  |  | 1,771 |
GROSS DEFERRED ASSETS |  |  | 41,066 |  |  |  | 41,857 |
Deferred tax liabilities: |  |  |  |  |  |  |  |
Net unrealized gains on securities available-for-sale |  |  | (8,954 | ) |  |  | (8,493 | )
Depreciation |  |  | (2,715 | ) |  |  | (1,830 | )
Mortgage servicing rights |  |  | (700 | ) |  |  | (763 | )
Pensions |  |  | (2,518 | ) |  |  | (3,587 | )
Intangibles |  |  | (541 | ) |  |  | - |
Other |  |  | (1,381 | ) |  |  | (1,055 | )
GROSS DEFERRED LIABILITIES |  |  | (16,809 | ) |  |  | (15,728 | )
NET DEFERRED TAX ASSETS (LIABILITIES) |  | $ | 24,257 |  |  | $ | 26,129 |
Reconciliation of Unrecognized Tax Benefits | Unrecognized Tax Benefits — A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:
(Dollar amounts in thousands) |  | 2012 |  |  | 2011 |  |  | 2010 |
Balance at January 1 |  | $ | 862 |  |  | $ | 901 |  |  | $ | 660 |
Additions based on tax positions related to the current year |  |  | 86 |  |  |  | 137 |  |  |  | 113 |
Additions based on tax positions related to prior years |  |  | - |  |  |  | - |  |  |  | 181 |
Reductions due to the statute of limitations |  |  | (171 | ) |  |  | (176 | ) |  |  | (53 | )
Balance at December 31 |  | $ | 777 |  |  | $ | 862 |  |  | $ | 901 |

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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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