[Line Items] for Accounting Policies [Table]

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- Definition

Assigned Drilling Rigs, Number of Contracts Expiring Six Months to Twelve Months

+ References

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- Definition

Assigned Drilling Rigs, Number of Contracts Expiring in Eighteen Months to Twenty Four Months

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- Definition

Assigned Drilling Rigs, Number of Contracts Expiring in Six Months

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- Definition

Assigned Drilling Rigs, Number of Contracts Expiring in Twelve Months to Eighteen Months

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- Definition

Assigned Drilling Rigs, Number of Contracts Expiring in Twenty Four Months to Fourty Eight Months

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- Definition

Drilling Rigs

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- Definition

Drilling Rigs, Contractual Terms

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- Definition

Gain (loss) related to the termination of a contract between the parties. The termination may be due to many causes including early termination of a lease by a lessee, a breach of contract by one party, or a failure to perform.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 420

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)(1)

-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

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Organization and Summary of Significant Accounting Policies (Drilling Contracts) (Details) $ in Millions	3 Months Ended		9 Months Ended	18 Months Ended
	Sep. 30, 2015 USD ($) drilling_rigs	Dec. 31, 2014 USD ($)	Sep. 30, 2015 USD ($) drilling_rigs	Mar. 31, 2016 USD ($)
Accounting Policies [Line Items]
Gain (Loss) on Contract Termination \| $	$ 11.7	$ 0.3	$ 39.0
Subsequent Event [Member]
Accounting Policies [Line Items]
Gain (Loss) on Contract Termination \| $				$ 53.0
Drilling Services Segment [Member]
Accounting Policies [Line Items]
Drilling Rigs	38		38
Drilling Services Segment [Member] \| Minimum [Member]
Accounting Policies [Line Items]
Drilling Rigs, Contractual Terms			six months
Drilling Services Segment [Member] \| Maximum [Member]
Accounting Policies [Line Items]
Drilling Rigs, Contractual Terms			4 years
Drilling Services Segment [Member] \| Currently Under Drilling Contract [Member]
Accounting Policies [Line Items]
Drilling Rigs	21		21
Drilling Services Segment [Member] \| Term Contract [Member] \| Currently Under Drilling Contract [Member]
Accounting Policies [Line Items]
Drilling Rigs	19		19
Assigned Drilling Rigs, Number of Contracts Expiring in Six Months	6		6
Assigned Drilling Rigs, Number of Contracts Expiring in Six Months to One Year	6		6
Assigned Drilling Rigs, Number of Contracts Expiring in Twelve Months to Eighteen Months	0		0
Assigned Drilling Rigs, Number of Contracts Expiring in Eighteen Months to Two Years	0		0
Assigned Drilling Rigs, Number of Contracts Expiring in Twenty Four Months to Fourty Eight Months	7		7
Drilling Services Segment [Member] \| Geographic Distribution, Domestic [Member] \| Term Contract [Member] \| Currently Under Drilling Contract [Member]
Accounting Policies [Line Items]
Drilling Rigs	16		16
Assigned Drilling Rigs, Number of Contracts Expiring in Six Months	6		6
Assigned Drilling Rigs, Number of Contracts Expiring in Six Months to One Year	5		5
Assigned Drilling Rigs, Number of Contracts Expiring in Twelve Months to Eighteen Months	0		0
Assigned Drilling Rigs, Number of Contracts Expiring in Eighteen Months to Two Years	0		0
Assigned Drilling Rigs, Number of Contracts Expiring in Twenty Four Months to Fourty Eight Months	5		5
Drilling Services Segment [Member] \| Geographic Distribution, Foreign [Member] \| Term Contract [Member] \| Currently Under Drilling Contract [Member]
Accounting Policies [Line Items]
Drilling Rigs	3		3
Assigned Drilling Rigs, Number of Contracts Expiring in Six Months	0		0
Assigned Drilling Rigs, Number of Contracts Expiring in Six Months to One Year	1		1
Assigned Drilling Rigs, Number of Contracts Expiring in Twelve Months to Eighteen Months	0		0
Assigned Drilling Rigs, Number of Contracts Expiring in Eighteen Months to Two Years	0		0
Assigned Drilling Rigs, Number of Contracts Expiring in Twenty Four Months to Fourty Eight Months	2		2
Drilling Services Segment [Member] \| Geographic Distribution, Foreign [Member] \| Term Contract, Cancelable [Member] \| Currently Under Drilling Contract [Member]
Accounting Policies [Line Items]
Drilling Rigs	3		3