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CONDENSED CONSOLIDATING FINANCIAL INFORMATION (Cash Flows) (Details) - USD ($) $ in Thousands | 6 Months Ended
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Jun. 30, 2020 | Jun. 30, 2019
Condensed Financial Statements, Captions [Line Items] |  |
Net cash provided by (used in) operating activities | $ 247,222 | $ 399,769
Net cash used in investing activities | (230,090) | (510,225)
Net cash (used in) provided by financing activities | (20,375) | 78,936
Net (decrease) increase in cash, cash equivalents and restricted cash | (3,243) | (31,520)
Cash, cash equivalents and restricted cash at beginning of period | 6,060 | 52,297
Cash, cash equivalents and restricted cash at end of period | 2,817 | 20,777
Reportable legal entities | Parent |  |
Condensed Financial Statements, Captions [Line Items] |  |
Net cash provided by (used in) operating activities | 18,854 | 312,267
Net cash used in investing activities | (424) | (405,848)
Net cash (used in) provided by financing activities | (20,375) | 78,936
Net (decrease) increase in cash, cash equivalents and restricted cash | (1,945) | (14,645)
Cash, cash equivalents and restricted cash at beginning of period | 2,768 | 25,585
Cash, cash equivalents and restricted cash at end of period | 823 | 10,940
Reportable legal entities | Guarantors |  |
Condensed Financial Statements, Captions [Line Items] |  |
Net cash provided by (used in) operating activities | 228,317 | 84,146
Net cash used in investing activities | (229,666) | (101,058)
Net cash (used in) provided by financing activities | 0 | 0
Net (decrease) increase in cash, cash equivalents and restricted cash | (1,349) | (16,912)
Cash, cash equivalents and restricted cash at beginning of period | 3,097 | 26,711
Cash, cash equivalents and restricted cash at end of period | 1,748 | 9,799
Reportable legal entities | Non-Guarantors |  |
Condensed Financial Statements, Captions [Line Items] |  |
Net cash provided by (used in) operating activities | (384) | 3,355
Net cash used in investing activities | 0 | (3,751)
Net cash (used in) provided by financing activities | 435 | 433
Net (decrease) increase in cash, cash equivalents and restricted cash | 51 | 37
Cash, cash equivalents and restricted cash at beginning of period | 195 | 1
Cash, cash equivalents and restricted cash at end of period | 246 | 38
Eliminations |  |
Condensed Financial Statements, Captions [Line Items] |  |
Net cash provided by (used in) operating activities | 435 | 1
Net cash used in investing activities | 0 | 432
Net cash (used in) provided by financing activities | (435) | (433)
Net (decrease) increase in cash, cash equivalents and restricted cash | 0 | 0
Cash, cash equivalents and restricted cash at beginning of period | 0 | 0
Cash, cash equivalents and restricted cash at end of period | $ 0 | $ 0

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- Definition Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3521-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3044-108585 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=121583591&loc=SL98516268-108586 + Details
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- Definition Amount of increase (decrease) in cash, cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including effect from exchange rate change. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 230 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=98513438&loc=d3e33268-110906 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3521-108585 + Details
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- Definition Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3521-108585 + Details
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- Definition Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3521-108585 + Details
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