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CONTINGENCIES - Performance Bonds (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Commitments And Contingencies Disclosure [Abstract] |  |
Malpractice loss contingency, letters of credit and surety bonds | $ 412 | $ 13,660

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- Definition Amount of letters of credit and other surety bonds that are available for the future payment of malpractice claims. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 954 -SubTopic 450 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6491354&loc=d3e6049-115624 + Details
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