Quarterly report pursuant to Section 13 or 15(d)

Property, Plant, and Equipment - Narratives (Details)

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Property, Plant, and Equipment - Narratives (Details) - USD ($)
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Property, Plant and Equipment [Line Items]    
Gain (loss) on disposal of property and equipment $ 593,000 $ 615,000
Proceeds from disposal of property and equipment 1,038,000 1,457,000
Comprehensive Income    
Property, Plant and Equipment [Line Items]    
Gain (loss) on disposal of property and equipment 200,000 600,000
Proceeds from disposal of property and equipment 600,000 1,500,000
Drilling rigs and related equipment    
Property, Plant and Equipment [Line Items]    
Gain (loss) on disposal of property and equipment $ 400,000  
Proceeds from disposal of property and equipment   $ 0