Acquisitions (Narrative) (Details) $ / shares in Units, shares in Millions |
3 Months Ended | |||
|---|---|---|---|---|
|
Feb. 17, 2017
USD ($)
a
$ / shares
shares
|
Mar. 31, 2017
USD ($)
|
Mar. 31, 2016
USD ($)
|
Dec. 15, 2016
$ / shares
|
|
| Business Acquisition [Line Items] | ||||
| Acquisition expense | $ 1,298,000 | $ 0 | ||
| Share price (in dollars per share) | $ / shares | $ 19.48 | $ 20.96 | ||
| Vitruvian acquisition | ||||
| Business Acquisition [Line Items] | ||||
| Net surface area | a | 46,400 | |||
| Total consideration | $ 1,850,000,000 | |||
| Payments to acquire businesses | $ 1,354,093,000 | |||
| Equity interest issued or issuable, number of shares | shares | 23.9 | |||
| Acquisition expense | $ 1,300,000 | |||
| Goodwill | $ 0 | |||
| Bargain purchase gain | 0 | |||
| Business acquisition, share price (in dollars per share) | $ / shares | $ 20.96 | |||
| Decrease in fair value of shares issued for acquisition, amount | $ 35,300,000 | |||
| Indemnity escrow | Vitruvian acquisition | ||||
| Business Acquisition [Line Items] | ||||
| Equity interest issued or issuable, number of shares | shares | 5.2 | |||
| X | ||||||||||
- Definition Business Combination, Aggregate Purchase Price No definition available.
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| X | ||||||||||
- Definition Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Fair Value Increase (Decrease), Amount No definition available.
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| X | ||||||||||
- Definition Gas And Oil Area, Net No definition available.
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| X | ||||||||||
- Definition Number of shares of equity interests issued or issuable to acquire entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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| X | ||||||||||
- Definition Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination. No definition available.
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| X | ||||||||||
- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition In a business combination in which the amount of net identifiable assets acquired and liabilities assumed exceeds the aggregate consideration transferred or to be transferred (as defined), this element represents the amount of gain recognized by the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Price of a single share of a number of saleable stocks of a company. No definition available.
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- Details
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| X | ||||||||||
- Details
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