Annual report pursuant to Section 13 and 15(d)

Costs and Estimated Earnings on Uncompleted Contracts - Information with Respect to Uncompleted Contracts (Detail)

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Costs and Estimated Earnings on Uncompleted Contracts - Information with Respect to Uncompleted Contracts (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Contractors [Abstract]    
Costs incurred on uncompleted contracts $ 742,608gifi_ContractsInProcess $ 991,123gifi_ContractsInProcess
Estimated profit earned to date 53,551gifi_EstimatedContractRecoveries 40,045gifi_EstimatedContractRecoveries
Contract costs and estimated profits 796,159gifi_ContractCostsAndEstimatedProfits 1,031,168gifi_ContractCostsAndEstimatedProfits
Less billings to date 787,936us-gaap_BilledContractReceivables 1,041,447us-gaap_BilledContractReceivables
Costs and estimated earnings in excess of billings $ 8,223gifi_NetBillingsInExcessOfCostsAndEstimatedEarningsOnUncompletedContracts $ (10,279)gifi_NetBillingsInExcessOfCostsAndEstimatedEarningsOnUncompletedContracts