Organization and Summary of Significant Accounting Policies (Drilling Contracts) (Details) (Drilling Services Segment [Member])	0 Months Ended
	Feb. 01, 2015	Dec. 31, 2014 drilling_rigs
Active [Member]
Accounting Policies [Line Items]
Drilling Rigs		53
Subsequent Event [Member]
Accounting Policies [Line Items]
Drilling Rigs	47
Subsequent Event [Member] | Colombia [Member]
Accounting Policies [Line Items]
Drilling Rigs	8
Subsequent Event [Member] | Term Contract [Member] | Currently Under Drilling Contract [Member]
Accounting Policies [Line Items]
Drilling Rigs	29
Assigned Drilling Rigs, Number of Contracts Expiring in Six Months	17
Assigned Drilling Rigs, Number of Contracts Expiring in One Year	6
Assigned Drilling Rigs, Number of Contracts Expiring in Eighteen Months	4
Assigned Drilling Rigs, Number of Contracts Expiring in Two Years	2
Subsequent Event [Member] | Term Contract [Member] | Currently Under Drilling Contract [Member] | UNITED STATES
Accounting Policies [Line Items]
Drilling Rigs	25
Assigned Drilling Rigs, Number of Contracts Expiring in Six Months	13
Assigned Drilling Rigs, Number of Contracts Expiring in One Year	6
Assigned Drilling Rigs, Number of Contracts Expiring in Eighteen Months	4
Assigned Drilling Rigs, Number of Contracts Expiring in Two Years	2
Subsequent Event [Member] | Term Contract [Member] | Currently Under Drilling Contract [Member] | Colombia [Member]
Accounting Policies [Line Items]
Drilling Rigs	4
Assigned Drilling Rigs, Number of Contracts Expiring in Six Months	4
Assigned Drilling Rigs, Number of Contracts Expiring in One Year	0
Assigned Drilling Rigs, Number of Contracts Expiring in Eighteen Months	0
Assigned Drilling Rigs, Number of Contracts Expiring in Two Years	0
Subsequent Event [Member] | Active [Member]
Accounting Policies [Line Items]
Drilling Rigs	47
Subsequent Event [Member] | Active [Member] | Currently Under Drilling Contract [Member]
Accounting Policies [Line Items]
Drilling Rigs	40
Subsequent Event [Member] | Active [Member] | Term Contract [Member] | Currently Under Drilling Contract [Member]
Accounting Policies [Line Items]
Drilling Rigs	29
Subsequent Event [Member] | Active [Member] | Term Contract [Member] | Currently Under Drilling Contract [Member] | Colombia [Member]
Accounting Policies [Line Items]
Drilling Rigs	4
Subsequent Event [Member] | Minimum [Member]
Accounting Policies [Line Items]
Drilling Rigs, Contractual Terms	six months
Subsequent Event [Member] | Maximum [Member]
Accounting Policies [Line Items]
Drilling Rigs, Contractual Terms	4 years