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Revenues by Geographic Location (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Geographic Reporting Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue, United States |  |  |  |  |  |  |  |  |  |  |  | $ 472,400 | $ 259,000 | $ 240,900
Revenue, International |  |  |  |  |  |  |  |  |  |  |  | 48,900 | 48,800 | 7,400
Revenue | $ 129,237 | [1] | $ 141,793 | [2] | $ 137,227 | $ 113,083 | $ 88,406 | $ 85,827 | $ 87,251 | $ 46,348 | [3] | $ 521,340 | $ 307,832 | $ 248,286
[1] | We determined the contract receivable balance owed by Bluewater Industries on the Cheviot project as describe in Note 2 would not likely be collected in full and recorded a $14.5 million reserve as of December 31, 2012.
[2] | We recognized contract losses of $20.6 million in the three-month period ended September 30, 2012 which resulted in an unfavorable reduction in gross margin during the period of $26.8 million as required under the accounting for loss contracts under percentage of completion accounting. This loss was mainly due to the increase in estimated man-hours to complete one of our major deepwater contracts. These increased man-hours were primarily driven by revisions and delivery delays to specifications and designs by our customer in the third quarter of 2012 causing out-of-sequence work schedules to be used while executing the project. The customer also extended delivery of the first phase of the project as a result of these revisions. On March 7, 2013 we executed change orders with the customer which settled issues raised in a claim for additional costs on this project. Revenue for this claim was recorded in the three-month period ended December 31, 2012.
[3] | On April 8, 2011, we received an unfavorable ruling regarding a disputed claim for costs incurred in connection with an April 2008 accident at our Texas facility involving four cranes. As a result, we recognized all recorded amounts as asset impairments in cost of revenue of $7.7 million, of which $5.9 million related to disputed crane rental costs and $1.8 million related to the remaining net book value of one of the cranes involved in the accident that is now deemed a total loss.

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- Definition Revenues from external customers attributed to the entity's country of domicile. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 38 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Revenues from external customers attributed to all foreign countries in total from which the entity derives revenues. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 38 -Subparagraph a(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains. + 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) -URI http://asc.fasb.org/extlink&oid=6880815&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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