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PROPERTY, PLANT AND EQUIPMENT - Narrative (Details)
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Nov. 30, 2022
rig
Mar. 31, 2024
USD ($)
Mar. 31, 2023
USD ($)
rig
Mar. 31, 2024
USD ($)
Mar. 31, 2023
USD ($)
rig
Sep. 30, 2023
USD ($)
Property, Plant and Equipment [Line Items]            
Depreciation   $ 102,900,000 $ 94,600,000 $ 195,300,000 $ 189,500,000  
Abandonments included in depreciation   2,600,000 1,000,000 3,100,000 2,100,000  
Accelerated depreciation   7,300,000 800,000 8,200,000 1,700,000  
Rigs damaged by fire | rig 1          
Abandonment expense         9,200,000  
Insurance proceeds           $ 9,200,000
Gain on involuntary conversion   5,500,000        
Insurance proceeds from involuntary conversion   5,000,000   4,980,000 0  
Outstanding receivable   500,000   500,000    
Asset impairment charges   0 0 0 12,097,000  
Property, plant and equipment, net   2,993,825,000   2,993,825,000   $ 2,921,695,000
Impairment charge for assets held for sale         1,300,000  
Gain on reimbursement of drilling equipment   $ 7,461,000 11,574,000 $ 14,955,000 27,298,000  
Assets Previously Held For Sale            
Property, Plant and Equipment [Line Items]            
Property, plant and equipment, net     3,000,000   3,000,000  
Property, plant, and equipment, salvage value     300,000   300,000  
Impairment charge for assets held for sale         2,700,000  
International FlexRig            
Property, Plant and Equipment [Line Items]            
Property, plant and equipment, net     8,800,000   8,800,000  
Property, plant, and equipment, salvage value     $ 700,000   700,000  
Impairment charge for assets held for sale         $ 8,100,000  
Number of rigs, held-for -sale | rig     4   4  
Conventional Drilling Rigs            
Property, Plant and Equipment [Line Items]            
Number of rigs, held-for -sale | rig     4   4  
Additional Equipment            
Property, Plant and Equipment [Line Items]            
Property, plant and equipment, net     $ 1,400,000   $ 1,400,000  
Property, plant, and equipment, salvage value     $ 100,000   $ 100,000