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INVESTMENTS IN DEBT AND EQUITY SECURITIES (Amortized cost to fair value) (Details) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Face value of bonds | $ 8,293 | $ 9,431
Corporate Bond Securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 7,699 | 8,516
Unrealized gains/(losses) | 594 | 915
Face value of bonds | 8,293 | 9,431
NorAm Drilling Bond |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 4,132 | 4,132
Unrealized gains/(losses) | 488 | 511
Face value of bonds | 4,620 | 4,643
NT Rig Holdco 12% |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 3,567 | 3,567
Unrealized gains/(losses) | 106 | 404
Face value of bonds | 3,673 | 3,971
NT Rig Holdco 7.5% |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 0 | 817
Unrealized gains/(losses) | 0 | 0
Face value of bonds | $ 0 | $ 817

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- Definition Amount, after tax, of accumulated unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e681-108580 + Details
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- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References No definition available. + Details
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121558606&loc=SL82898722-210454 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121553693&loc=d3e26610-111562 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563 + Details
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