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CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Income Statement [Abstract] |  |  |
Revenue | $ 506,639 us-gaap_Revenues | $ 608,326 us-gaap_Revenues | $ 521,340 us-gaap_Revenues
Cost of revenue: |  |  |
Contract costs | 462,083 us-gaap_ContractRevenueCost | 584,665 us-gaap_ContractRevenueCost | 502,999 us-gaap_ContractRevenueCost
Provision for loss on contract receivable |  |  | 14,501 us-gaap_ProvisionForDoubtfulAccounts
Total cost of revenue | 462,083 us-gaap_CostOfRevenue | 584,665 us-gaap_CostOfRevenue | 517,500 us-gaap_CostOfRevenue
Gross profit | 44,556 us-gaap_GrossProfit | 23,661 us-gaap_GrossProfit | 3,840 us-gaap_GrossProfit
General and administrative expenses | 20,609 us-gaap_GeneralAndAdministrativeExpense | 11,555 us-gaap_GeneralAndAdministrativeExpense | 9,806 us-gaap_GeneralAndAdministrativeExpense
Operating income (loss) | 23,947 us-gaap_OperatingIncomeLoss | 12,106 us-gaap_OperatingIncomeLoss | (5,966)us-gaap_OperatingIncomeLoss
Other income (expense): |  |  |
Interest expense | (37)us-gaap_InterestExpense | (237)us-gaap_InterestExpense | (153)us-gaap_InterestExpense
Interest income | 13 us-gaap_InvestmentIncomeInterest | 3 us-gaap_InvestmentIncomeInterest | 586 us-gaap_InvestmentIncomeInterest
Other income (expense), net | (99)us-gaap_OtherNonoperatingIncomeExpense | (337)us-gaap_OtherNonoperatingIncomeExpense | 128 us-gaap_OtherNonoperatingIncomeExpense
Total other income (expense) | (123)us-gaap_NonoperatingIncomeExpense | (571)us-gaap_NonoperatingIncomeExpense | 561 us-gaap_NonoperatingIncomeExpense
Income (loss) before income taxes | 23,824 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 11,535 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | (5,405)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Income taxes | 8,504 us-gaap_IncomeTaxExpenseBenefit | 4,303 us-gaap_IncomeTaxExpenseBenefit | (1,314)us-gaap_IncomeTaxExpenseBenefit
Net income (loss) | $ 15,320 us-gaap_NetIncomeLoss | $ 7,232 us-gaap_NetIncomeLoss | $ (4,091)us-gaap_NetIncomeLoss
Per share data: |  |  |
Basic earnings (loss) per share-common shareholders | $ 1.05 us-gaap_EarningsPerShareBasic | $ 0.50 us-gaap_EarningsPerShareBasic | $ (0.29)us-gaap_EarningsPerShareBasic
Diluted earnings (loss) per share-common shareholders | $ 1.05 us-gaap_EarningsPerShareDiluted | $ 0.50 us-gaap_EarningsPerShareDiluted | $ (0.29)us-gaap_EarningsPerShareDiluted

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