Organization and Summary of Significant Accounting Policies (Drilling Contracts) (Details) $ in Millions	3 Months Ended	12 Months Ended		27 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($) drilling_rigs	Dec. 31, 2016 USD ($)	Feb. 15, 2016 drilling_rigs
Accounting Policies [Line Items]
Gain (Loss) on Contract Termination | $	$ 0.3		$ 49.2
Subsequent Event [Member]
Accounting Policies [Line Items]
Gain (Loss) on Contract Termination | $		$ 13.3		$ 62.8
Drilling Services Segment [Member]
Accounting Policies [Line Items]
Drilling Rigs			31
Drilling Services Segment [Member] | Received Early Termination Notice on Contract [Member] | Subsequent Event [Member]
Accounting Policies [Line Items]
Drilling Rigs					19
Drilling Services Segment [Member] | Currently Under Drilling Contract [Member] | Subsequent Event [Member]
Accounting Policies [Line Items]
Drilling Rigs					17
Drilling Services Segment [Member] | Currently Under Drilling Contract [Member] | Spot Market Contract [Member] | Subsequent Event [Member]
Accounting Policies [Line Items]
Drilling Rigs					2
Drilling Services Segment [Member] | Currently Under Drilling Contract [Member] | Term Contract [Member] | Subsequent Event [Member]
Accounting Policies [Line Items]
Drilling Rigs					15
Assigned Drilling Rigs, Number of Contracts Expiring in Six Months					4
Assigned Drilling Rigs, Number of Contracts Expiring in Six Months to One Year					4
Assigned Drilling Rigs, Number of Contracts Expiring in Twelve Months to Eighteen Months					0
Assigned Drilling Rigs, Number of Contracts Expiring in Eighteen Months to Two Years					1
Assigned Drilling Rigs, Number of Contracts Expiring in Twenty Four Months to Fourty Eight Months					6
Drilling Services Segment [Member] | Geographic Distribution, Domestic [Member] | Subsequent Event [Member]
Accounting Policies [Line Items]
Drilling Rigs					23
Drilling Services Segment [Member] | Geographic Distribution, Domestic [Member] | Currently Under Drilling Contract [Member] | Subsequent Event [Member]
Accounting Policies [Line Items]
Drilling Rigs					14
Drilling Services Segment [Member] | Geographic Distribution, Domestic [Member] | Currently Under Drilling Contract [Member] | Term Contract [Member] | Subsequent Event [Member]
Accounting Policies [Line Items]
Drilling Rigs					12
Drilling Services Segment [Member] | Geographic Distribution, Domestic [Member] | Currently Under Drilling Contract [Member] | Earning Under Contract [Member] | Spot Market Contract [Member] | Subsequent Event [Member]
Accounting Policies [Line Items]
Drilling Rigs					2
Drilling Services Segment [Member] | Geographic Distribution, Domestic [Member] | Currently Under Drilling Contract [Member] | Earning Under Contract [Member] | Term Contract [Member] | Subsequent Event [Member]
Accounting Policies [Line Items]
Drilling Rigs					8
Assigned Drilling Rigs, Number of Contracts Expiring in Six Months					1
Assigned Drilling Rigs, Number of Contracts Expiring in Six Months to One Year					2
Assigned Drilling Rigs, Number of Contracts Expiring in Twelve Months to Eighteen Months					0
Assigned Drilling Rigs, Number of Contracts Expiring in Eighteen Months to Two Years					1
Assigned Drilling Rigs, Number of Contracts Expiring in Twenty Four Months to Fourty Eight Months					4
Drilling Services Segment [Member] | Geographic Distribution, Domestic [Member] | Currently Under Drilling Contract [Member] | Earning But Not Working [Member] | Spot Market Contract [Member] | Subsequent Event [Member]
Accounting Policies [Line Items]
Drilling Rigs					0
Drilling Services Segment [Member] | Geographic Distribution, Domestic [Member] | Currently Under Drilling Contract [Member] | Earning But Not Working [Member] | Term Contract [Member] | Subsequent Event [Member]
Accounting Policies [Line Items]
Drilling Rigs					4
Assigned Drilling Rigs, Number of Contracts Expiring in Six Months					3
Assigned Drilling Rigs, Number of Contracts Expiring in Six Months to One Year					1
Assigned Drilling Rigs, Number of Contracts Expiring in Twelve Months to Eighteen Months					0
Assigned Drilling Rigs, Number of Contracts Expiring in Eighteen Months to Two Years					0
Assigned Drilling Rigs, Number of Contracts Expiring in Twenty Four Months to Fourty Eight Months					0
Drilling Services Segment [Member] | Geographic Distribution, Foreign [Member] | Currently Under Drilling Contract [Member] | Term Contract, Cancelable [Member] | Subsequent Event [Member]
Accounting Policies [Line Items]
Drilling Rigs					3
Drilling Services Segment [Member] | Geographic Distribution, Foreign [Member] | Currently Under Drilling Contract [Member] | Suspended Operations (not earning) [Member] | Spot Market Contract [Member] | Subsequent Event [Member]
Accounting Policies [Line Items]
Drilling Rigs					0
Drilling Services Segment [Member] | Geographic Distribution, Foreign [Member] | Currently Under Drilling Contract [Member] | Suspended Operations (not earning) [Member] | Term Contract [Member] | Subsequent Event [Member]
Accounting Policies [Line Items]
Assigned Drilling Rigs, Number of Contracts Expiring in Six Months					0
Assigned Drilling Rigs, Number of Contracts Expiring in Six Months to One Year					1
Assigned Drilling Rigs, Number of Contracts Expiring in Twelve Months to Eighteen Months					0
Assigned Drilling Rigs, Number of Contracts Expiring in Eighteen Months to Two Years					0
Assigned Drilling Rigs, Number of Contracts Expiring in Twenty Four Months to Fourty Eight Months					2
Drilling Services Segment [Member] | Geographic Distribution, Foreign [Member] | Currently Under Drilling Contract [Member] | Suspended Operations (not earning) [Member] | Term Contract, Cancelable [Member] | Subsequent Event [Member]
Accounting Policies [Line Items]
Drilling Rigs					3
Colombia [Member] | Drilling Services Segment [Member]
Accounting Policies [Line Items]
Drilling Rigs			8
Minimum [Member] | Drilling Services Segment [Member]
Accounting Policies [Line Items]
Drilling Rigs, Contractual Terms			six months
Maximum [Member] | Drilling Services Segment [Member]
Accounting Policies [Line Items]
Drilling Rigs, Contractual Terms			4 years