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FINANCING ARRANGEMENTS - Summary of Long-term Debt (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Debt Instrument [Line Items] |  |
Current portion of long-term debt | $ 17,535 | $ 7,535
Long-term debt, at par | 2,547,091 | 1,564,626
Unamortized debt issuance costs and discount, net | (30,067) | (14,985)
Long-term debt, at carrying value | 2,517,024 | 1,549,641
Secured debt | Secured senior term loans |  |
Debt Instrument [Line Items] |  |
Current portion of long-term debt | 17,535 | 7,535
Secured debt | Secured senior term loans due June 30, 2024 ("2024 Term Loans") |  |
Debt Instrument [Line Items] |  |
Long-term debt, at par | 712,091 | 719,626
Secured debt | Secured senior term loans due October 8, 2028 ("2028 Term Loans") |  |
Debt Instrument [Line Items] |  |
Long-term debt, at par | 990,000 | 0
Unsecured debt | Unsecured senior notes, at 4.875%, due July 15, 2027 ("2027 Notes") |  |
Debt Instrument [Line Items] |  |
Long-term debt, at par | $ 545,000 | 545,000
Interest rate (as a percent) | 4.875% |
Unsecured debt | Unsecured senior notes, at 5.125%, due July 15, 2029 ("2029 Notes") |  |
Debt Instrument [Line Items] |  |
Long-term debt, at par | $ 300,000 | $ 300,000
Interest rate (as a percent) | 5.125% |

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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