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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Income Statement [Abstract] |  |  |
Revenue | $ 286,326 | $ 306,120 | $ 506,639
Cost of revenue: |  |  |
Contract costs | 261,473 | 321,276 | 462,083
Gross profit (loss) | 24,853 | (15,156) | 44,556
General and administrative expenses | 19,670 | 16,256 | 17,409
Asset impairment | 0 | 7,202 | 3,200
Operating income (loss) | 5,183 | (38,614) | 23,947
Other income (expense): |  |  |
Interest expense | (332) | (165) | (37)
Interest income | 24 | 26 | 13
Other income (expense), net | 681 | 20 | (99)
Total Other income (expense) | 373 | (119) | (123)
Net income (loss) before income taxes | 5,556 | (38,733) | 23,824
Income tax expense (benefit) | 2,041 | (13,369) | 8,504
Net income (loss) | $ 3,515 | $ (25,364) | $ 15,320
Per share data: |  |  |
Basic and diluted earnings (loss) per share—common shareholders (in dollars per share) | $ 0.24 | $ (1.75) | $ 1.05

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