Segment Information (Schedule of Drilling Services Segment Divisions) (Details) (Drilling Services Segment [Member])	Sep. 30, 2014 drilling_rigs
Segment Reporting Information [Line Items]
Drilling Rigs	62
South Texas [Member]
Segment Reporting Information [Line Items]
Drilling Rigs	14
West Texas [Member]
Segment Reporting Information [Line Items]
Drilling Rigs	20
North Dakota [Member]
Segment Reporting Information [Line Items]
Drilling Rigs	9
UTAH
Segment Reporting Information [Line Items]
Drilling Rigs	7
Appalachia [Member]
Segment Reporting Information [Line Items]
Drilling Rigs	4
Colombia [Member]
Segment Reporting Information [Line Items]
Drilling Rigs	8