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INCOME TAXES, Components of Net Deferred Tax Liability (Details) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Components of net deferred tax liability [Abstract] |  |
Allowance for loan losses | $ 17,791 | $ 17,476
Employee benefits | 6,633 | 6,834
Debt extinguishment | 613 | 904
Other, net | 9,704 | 10,725
Deferred tax asset | 34,741 | 35,939
Investment securities | 38,314 | 37,527
Tax-deductible goodwill | 39,724 | 35,842
Loan origination costs | 7,295 | 6,792
Depreciation | 886 | 3,722
Mortgage servicing rights | 565 | 419
Pension | 14,807 | 16,845
Deferred tax liability | 101,591 | 101,147
Net deferred tax liability | $ (66,850) | $ (65,208)

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- Definition Amount of deferred tax liability attributable to taxable temporary differences. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Deferred Tax Liability -URI http://asc.fasb.org/extlink&oid=6510232 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph b(2) -Article 7 + Details
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