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EMPLOYEE BENEFITS AND STOCK BASED COMPENSATION (Schedule of Recognized Stock-Based Compensation Expense) (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Employee Benefits and Share-based Compensation, Noncash [Abstract] |  |  |
Stock-based compensation expense | $ 9,258 | $ 8,332 | $ 6,132
Reduction of income tax expense | $ 1,944 | $ 1,750 | $ 1,287
Per share compensation cost | $ 0.09 | $ 0.08 | $ 0.07

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- Definition Amount of tax benefit for recognition of expense of award under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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