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INCOME TAXES, Components of Net Deferred Tax Liability (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Components of net deferred tax liability [Abstract] |  |
Allowance for loan losses | $ 15,004 | $ 12,059
Employee benefits | 7,552 | 5,393
Operating lease liabilities | 8,601 | 9,801
Other, net | 900 | 837
Deferred tax asset | 32,057 | 28,090
Investment securities | 43,325 | 21,547
Goodwill and intangibles | 40,802 | 39,189
Operating lease right-of-use assets | 8,384 | 9,566
Loan origination costs | 7,904 | 7,639
Depreciation | 3,089 | 2,736
Mortgage servicing rights | 291 | 162
Pension | 16,987 | 13,769
Deferred tax liability | 120,782 | 94,608
Net deferred tax liability | $ (88,725) | $ (66,518)

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