Organization and Summary of Significant Accounting Policies (Drilling Services Segment) (Details) - Drilling Rigs Status [Domain] - Subsequent Event Type [Domain] - Drilling Services Segment [Member]	Jun. 30, 2015 drilling_rigs
Accounting Policies [Line Items]
Drilling Rigs	35
South Texas [Member]
Accounting Policies [Line Items]
Drilling Rigs	11
West Texas [Member]
Accounting Policies [Line Items]
Drilling Rigs	4
North Dakota [Member]
Accounting Policies [Line Items]
Drilling Rigs	8
Appalachia [Member]
Accounting Policies [Line Items]
Drilling Rigs	4
Colombia [Member]
Accounting Policies [Line Items]
Drilling Rigs	8