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Contracts in Process (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
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Net asset (liability) position for contracts in process |  |
Costs and estimated earnings on uncompleted contracts | $ 1,748,204 | $ 1,439,455
Less: Billings to date | 1,760,637 | 1,410,271
Net costs and estimated earnings in excess of billings | (12,433) | 29,184
Net asset (liability) position for contracts in process included in consolidated balance sheet |  |
Costs and estimated earnings in excess of billings on uncompleted contracts | 40,519 | 61,773
Billings in excess of costs and estimated earnings on uncompleted contracts | (52,952) | (32,589)
Net costs and estimated earnings in excess of billings | $ (12,433) | $ 29,184

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