Segment Information (Schedule of Drilling Services Segment Divisions) (Details)	Dec. 31, 2014 drilling_rigs	Sep. 30, 2013 drilling_rigs	Feb. 01, 2015 drilling_rigs
Owned [Member] | Drilling Services Segment [Member]
Segment Reporting Information [Line Items]
Drilling Rigs	62
Active [Member] | Drilling Services Segment [Member]
Segment Reporting Information [Line Items]
Drilling Rigs	53
Drilling Rigs [Member]
Segment Reporting Information [Line Items]
Drilling Rigs Held for Sale	9	8
Subsequent Event [Member] | Drilling Services Segment [Member]
Segment Reporting Information [Line Items]
Drilling Rigs			47
Subsequent Event [Member] | Drilling Services Segment [Member] | South Texas [Member]
Segment Reporting Information [Line Items]
Drilling Rigs			13
Subsequent Event [Member] | Drilling Services Segment [Member] | West Texas [Member]
Segment Reporting Information [Line Items]
Drilling Rigs			10
Subsequent Event [Member] | Drilling Services Segment [Member] | North Dakota [Member]
Segment Reporting Information [Line Items]
Drilling Rigs			9
Subsequent Event [Member] | Drilling Services Segment [Member] | UTAH
Segment Reporting Information [Line Items]
Drilling Rigs			4
Subsequent Event [Member] | Drilling Services Segment [Member] | Appalachia [Member]
Segment Reporting Information [Line Items]
Drilling Rigs			3
Subsequent Event [Member] | Drilling Services Segment [Member] | Colombia [Member]
Segment Reporting Information [Line Items]
Drilling Rigs			8
Subsequent Event [Member] | Owned [Member] | Drilling Services Segment [Member]
Segment Reporting Information [Line Items]
Drilling Rigs			59
Subsequent Event [Member] | Active [Member] | Drilling Services Segment [Member]
Segment Reporting Information [Line Items]
Drilling Rigs			47
Subsequent Event [Member] | Drilling Rigs [Member]
Segment Reporting Information [Line Items]
Drilling Rigs Held for Sale			12