Organization and Summary of Significant Accounting Policies (Drilling Contracts) (Details) (Drilling Services Segment [Member])	Mar. 31, 2014 drilling_rigs
Accounting Policies [Line Items]
Drilling Rigs	62
Colombia [Member]
Accounting Policies [Line Items]
Drilling Rigs	8
Term Contract [Member] | Currently Under Drilling Contract [Member]
Accounting Policies [Line Items]
Drilling Rigs	43
Assigned Drilling Rigs, Number of Contracts Expiring in Six Months	21
Assigned Drilling Rigs, Number of Contracts Expiring in One Year	16
Assigned Drilling Rigs, Number of Contracts Expiring in Eighteen Months	0
Assigned Drilling Rigs, Number of Contracts Expiring in Two Years	4
Assigned Drilling Rigs, Number of Contracts Expiring in Four Years	2
Term Contract [Member] | Currently Under Drilling Contract [Member] | United States [Member]
Accounting Policies [Line Items]
Drilling Rigs	35
Assigned Drilling Rigs, Number of Contracts Expiring in Six Months	21
Assigned Drilling Rigs, Number of Contracts Expiring in One Year	8
Assigned Drilling Rigs, Number of Contracts Expiring in Eighteen Months	0
Assigned Drilling Rigs, Number of Contracts Expiring in Two Years	4
Assigned Drilling Rigs, Number of Contracts Expiring in Four Years	2
Term Contract [Member] | Currently Under Drilling Contract [Member] | Colombia [Member]
Accounting Policies [Line Items]
Drilling Rigs	8
Assigned Drilling Rigs, Number of Contracts Expiring in Six Months	0
Assigned Drilling Rigs, Number of Contracts Expiring in One Year	8
Active [Member] | Currently Under Drilling Contract [Member]
Accounting Policies [Line Items]
Drilling Rigs	54
Active [Member] | Term Contract [Member] | Currently Under Drilling Contract [Member]
Accounting Policies [Line Items]
Drilling Rigs	41
Active [Member] | Term Contract [Member] | Currently Under Drilling Contract [Member] | Colombia [Member]
Accounting Policies [Line Items]
Drilling Rigs	6
Minimum [Member]
Accounting Policies [Line Items]
Drilling Rigs, Contractual Term	six months
Maximum [Member]
Accounting Policies [Line Items]
Drilling Rigs, Contractual Term	4 years