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Acquisitions and Divestitures - Allocation of Purchase Price (Details) - USD ($) $ in Thousands | Oct. 01, 2013 | Sep. 26, 2013
--- | --- | ---
West Williston |  |
Business Combination, Consideration Transferred [Abstract] |  |
Cash | $ 1,475,361 |
Forgiveness of debt | 0 |
Total consideration | 1,475,361 |
Assets acquired: |  |
Proved developed properties | 519,712 |
Proved undeveloped properties | 165,907 |
Unproved lease acquisition costs | 787,589 |
Other property and equipment | 13,157 |
Inventory | 3,181 |
Accounts receivable | 276 |
Total assets acquired | 1,489,822 |
Liabilities assumed: |  |
Asset retirement obligations | 6,598 |
Revenues payable | 7,863 |
Total liabilities assumed | 14,461 |
Total identifiable net assets | $ 1,475,361 |
East Nesson |  |
Business Combination, Consideration Transferred [Abstract] |  |
Cash |  | $ 56,793
Forgiveness of debt |  | (43)
Total consideration |  | 56,750
Assets acquired: |  |
Proved developed properties |  | 32,053
Proved undeveloped properties |  | 1,807
Unproved lease acquisition costs |  | 23,369
Other property and equipment |  | 0
Inventory |  | 148
Accounts receivable |  | 0
Total assets acquired |  | 57,377
Liabilities assumed: |  |
Asset retirement obligations |  | 307
Revenues payable |  | 320
Total liabilities assumed |  | 627
Total identifiable net assets |  | $ 56,750

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- Definition Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4845-128472 + Details
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