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Construction Contracts - Additional Information (Details) (USD $) | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Construction Contracts [Line Items] |  |  |
Billings and contract loss in excess of costs incurred | $ 0 | $ 15,546,000 |
Construction contract revenue | 23,349,000 | 796,323,000 | 0
Construction contract costs | 23,349,000 | 796,323,000 | 0
Costs in excess of billings and contract loss | 4,079,000 | 11,229,000 |
Century Plant |  |  |
Construction Contracts [Line Items] |  |  |
Construction agreement description | The Company constructed the Century Plant for a contract price of $796.3 million, which included agreed upon change orders and scope revisions, that Occidental paid to the Company through periodic cost reimbursements based upon the percentage of the project completed. Upon substantial completion of construction in late 2012, Occidental took ownership and began operating the plant for the purpose of separating and removing CO2 from the delivered natural gas stream |  |
Construction contract price |  | 796,323,000 |
Cumulative loss on construction contracts |  | 180,000,000 |
Billings and contract loss in excess of costs incurred |  | 15,546,000 |
Treating agreement contract term | 30 years |  |
Construction contract revenue |  | 796,323,000 |
Construction contract costs |  | 796,323,000 |
Costs in excess of billings and contract loss | 4,079,000 |  |
Transmission Expansion Projects |  |  |
Construction Contracts [Line Items] |  |  |
Construction agreement description | In the second quarter of 2013, the Company substantially completed the construction of a series of electrical transmission expansion and upgrade projects in northern Oklahoma for a third party. The Company constructed these projects for a contract price of $23.3 million, which included agreed upon change orders. |  |
Construction contract price | 23,349,000 |  |
Construction contract revenue | 23,349,000 |  |
Construction contract costs | 23,349,000 |  |
Costs in excess of billings and contract loss |  | $ 11,229,000 |

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- Definition Liability attributable to (i) billings in excess of costs under the percentage of completion contract accounting method representing the difference between contractually invoiced amounts (billings) and revenue recognized based, for example, on costs incurred to estimated total costs at period end or (ii) contractually invoiced amounts (billings) in excess of costs incurred and accumulated under the completed contract accounting method that are expected to be realized within one year or one operating cycle, whichever is longer, from the reporting date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 35 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6802688&loc=d3e57788-111642 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 35 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6802688&loc=d3e57807-111642 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 35 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6802688&loc=d3e57795-111642 + Details
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- Definition The aggregate revenue from building and real estate development, which may include improvements (such as drainage, utilities, grading and subdividing) to a parcel of land, and general contracting services during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(e)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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