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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
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Changes in operating assets and liabilities increasing (decreasing) cash
Costs in excess of billings	$ 11,229us-gaap_IncreaseDecreaseInBillingInExcessOfCostOfEarnings	$ (11,229)us-gaap_IncreaseDecreaseInBillingInExcessOfCostOfEarnings	$ 0us-gaap_IncreaseDecreaseInBillingInExcessOfCostOfEarnings
Other current assets	(3,269)us-gaap_IncreaseDecreaseInOtherCurrentAssets	(1,586)us-gaap_IncreaseDecreaseInOtherCurrentAssets	1,432us-gaap_IncreaseDecreaseInOtherCurrentAssets
Accounts payable and accrued expenses	101,453us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	44,115us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	40,509us-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	810us-gaap_IncreaseDecreaseInOtherCurrentAssets / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember	(1,586)us-gaap_IncreaseDecreaseInOtherCurrentAssets / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember	1,432us-gaap_IncreaseDecreaseInOtherCurrentAssets / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember
Accounts payable and accrued expenses	$ 116,999us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember	$ 121,889us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember	$ 51,522us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember

X

- 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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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- 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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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- 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

Name:	us-gaap_IncreaseDecreaseInOtherCurrentAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: