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Restatement and Revision of Previously Issued Financial Statements - Consolidated Statements of Cash Flows (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Changes in operating assets and liabilities increasing (decreasing) cash |  |  |
Costs in excess of billings | $ 11,229 us-gaap_IncreaseDecreaseInBillingInExcessOfCostOfEarnings | $ (11,229)us-gaap_IncreaseDecreaseInBillingInExcessOfCostOfEarnings | $ 0 us-gaap_IncreaseDecreaseInBillingInExcessOfCostOfEarnings
Other current assets | (3,269)us-gaap_IncreaseDecreaseInOtherCurrentAssets | (1,586)us-gaap_IncreaseDecreaseInOtherCurrentAssets | 1,432 us-gaap_IncreaseDecreaseInOtherCurrentAssets
Accounts payable and accrued expenses | 101,453 us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities | 44,115 us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities | 40,509 us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities
As Reported |  |  |
Changes in operating assets and liabilities increasing (decreasing) cash |  |  |
Costs in excess of billings | (8,396)us-gaap_IncreaseDecreaseInBillingInExcessOfCostOfEarnings / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember | (89,003)us-gaap_IncreaseDecreaseInBillingInExcessOfCostOfEarnings / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember | (11,013)us-gaap_IncreaseDecreaseInBillingInExcessOfCostOfEarnings / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember
Other current assets | 810 us-gaap_IncreaseDecreaseInOtherCurrentAssets / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember | (1,586)us-gaap_IncreaseDecreaseInOtherCurrentAssets / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember | 1,432 us-gaap_IncreaseDecreaseInOtherCurrentAssets / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember
Accounts payable and accrued expenses | $ 116,999 us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember | $ 121,889 us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember | $ 51,522 us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember

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- Definition The increase (decrease) during the reporting period in the amounts payable to vendors for goods and services received and the amount of obligations and expenses incurred but not paid. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- Definition The increase (decrease) during the reporting period in the liability reflecting cash payments received before the related costs have been incurred. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- Definition The increase (decrease) during the reporting period in other current operating assets not separately disclosed in the statement of cash flows. + References No definition available. + Details
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