Organization and Summary of Significant Accounting Policies (Production Services Segment) (Details) - Production Services Segment [Member]	Mar. 31, 2017 coiled_tubing_units well_service_rigs wireline_tubing_units
Accounting Policies [Line Items]
Well Servicing Rigs | well_service_rigs	125
Wireline Units | wireline_tubing_units	114
Coiled Tubing Units | coiled_tubing_units	17
550 Horsepower [Member]
Accounting Policies [Line Items]
Well Servicing Rigs | well_service_rigs	113
600 Horsepower [Member]
Accounting Policies [Line Items]
Well Servicing Rigs | well_service_rigs	12
Offshore Units [Domain]
Accounting Policies [Line Items]
Wireline Units | wireline_tubing_units	6
Coiled Tubing Units | coiled_tubing_units	5
Onshore [Member]
Accounting Policies [Line Items]
Wireline Units | wireline_tubing_units	108
Coiled Tubing Units | coiled_tubing_units	12