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EMPLOYEE BENEFIT PLANS (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 USD ($) employee | Dec. 31, 2018 USD ($) employee | Dec. 31, 2017 USD ($)
EMPLOYEE BENEFIT PLANS |  |  |
Contribution liability | $ 6,194 | $ 6,017 |
Stop loss coverage | $ 130 |  |
Number of Participant | employee | 566 | 570 |
Claims and Administrative service fees | $ 5,638 | $ 6,139 | $ 6,178
SERP |  |  |
EMPLOYEE BENEFIT PLANS |  |  |
Defined contribution plan term | 30 years |  |
Deferred compensation liability | $ 12,789 | 9,179 |
Compensation expense | 4,291 | 505 | 514
Profit Sharing Plan |  |  |
EMPLOYEE BENEFIT PLANS |  |  |
Contribution expense | $ 1,223 | $ 1,109 | $ 920
Employees contributions vesting period | 6 years |  |

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- Definition Amount of claims and administrative expense incurred by partially self-insured medical plan. + References No definition available. + Details
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- Definition Minimum period the individual is required to perform services to be fully vested under the deferred compensation arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 710 -SubTopic 10 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6409961&loc=d3e20487-108367 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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