Organization and Summary of Significant Accounting Policies (Production Services Business) (Details)	Sep. 30, 2020 wireline_tubing_units well_service_rigs
Well Servicing [Member] | Production Services [Member]
Accounting Policies [Line Items]
Well Servicing Rigs	123
Well Servicing [Member] | 550 Horsepower [Member]
Accounting Policies [Line Items]
Well Servicing Rigs	111
Well Servicing [Member] | 600 Horsepower [Member]
Accounting Policies [Line Items]
Well Servicing Rigs	12
Wireline Services [Member] | Production Services [Member]
Accounting Policies [Line Items]
Wireline Units | wireline_tubing_units	78