Organization and Summary of Significant Accounting Policies (Drilling Services Segment) (Details)	Feb. 01, 2015 drilling_rigs	Dec. 31, 2014 drilling_rigs	Sep. 30, 2013 drilling_rigs
Subsequent Event [Member] | Drilling Services Segment [Member]
Accounting Policies [Line Items]
Drilling Rigs	47
Subsequent Event [Member] | South Texas [Member] | Drilling Services Segment [Member]
Accounting Policies [Line Items]
Drilling Rigs	13
Subsequent Event [Member] | West Texas [Member] | Drilling Services Segment [Member]
Accounting Policies [Line Items]
Drilling Rigs	10
Subsequent Event [Member] | North Dakota [Member] | Drilling Services Segment [Member]
Accounting Policies [Line Items]
Drilling Rigs	9
Subsequent Event [Member] | UTAH | Drilling Services Segment [Member]
Accounting Policies [Line Items]
Drilling Rigs	4
Subsequent Event [Member] | Appalachia [Member] | Drilling Services Segment [Member]
Accounting Policies [Line Items]
Drilling Rigs	3
Subsequent Event [Member] | Colombia [Member] | Drilling Services Segment [Member]
Accounting Policies [Line Items]
Drilling Rigs	8
Drilling Rigs [Member]
Accounting Policies [Line Items]
Drilling Rigs Held for Sale		9	8
Drilling Rigs [Member] | Subsequent Event [Member]
Accounting Policies [Line Items]
Drilling Rigs Held for Sale	12
Active [Member] | Drilling Services Segment [Member]
Accounting Policies [Line Items]
Drilling Rigs		53
Active [Member] | Subsequent Event [Member] | Drilling Services Segment [Member]
Accounting Policies [Line Items]
Drilling Rigs	47