Organization and Summary of Significant Accounting Policies (Drilling Services Segment) (Details) - Drilling Services Segment [Member] - drilling_rigs	Sep. 30, 2016	Sep. 30, 2015
Accounting Policies [Line Items]
Drilling Rigs	31
South Texas [Member]
Accounting Policies [Line Items]
Drilling Rigs	6
West Texas [Member]
Accounting Policies [Line Items]
Drilling Rigs	8
North Dakota [Member]
Accounting Policies [Line Items]
Drilling Rigs	3
Appalachia [Member]
Accounting Policies [Line Items]
Drilling Rigs	6
Colombia [Member]
Accounting Policies [Line Items]
Drilling Rigs	8	8
Pad-Capable [Member]
Accounting Policies [Line Items]
Percentage of Drilling Fleet	94.00%
New in Last Five Years [Member] | New-build AC [Domain]
Accounting Policies [Line Items]
Drilling Rigs	15
Drilling Rigs [Member] | Colombia [Member]
Accounting Policies [Line Items]
Drilling Rigs	5	5