LEASES - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Lease Assets [Abstract]
Operating lease, noncurrent assets	$ 255,964	$ 214,809
Finance lease, noncurrent assets	$ 39,571	$ 44,190
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	r:SalesTypeLeasesAndOtherAssets	r:SalesTypeLeasesAndOtherAssets
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization r:RevenueEarningEquipmentNetOfAccumulatedDepreciation	us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization r:RevenueEarningEquipmentNetOfAccumulatedDepreciation
Liabilities, Current [Abstract]
Operating lease, current liabilities	$ 78,785	$ 72,285
Finance lease, current liabilities	$ 13,282	$ 12,381
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccountsPayableAndOtherAccruedLiabilitiesCurrent	us-gaap:AccountsPayableAndOtherAccruedLiabilitiesCurrent
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:DebtCurrent	us-gaap:DebtCurrent
Liabilities, Noncurrent [Abstract]
Operating lease, noncurrent liabilities	$ 186,429	$ 151,361
Finance lease, noncurrent liabilities	$ 35,136	$ 39,336
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent	us-gaap:OtherLiabilitiesNoncurrent
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:LongTermDebtAndCapitalLeaseObligations	us-gaap:LongTermDebtAndCapitalLeaseObligations