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Note 20 - Quarterly Financial Information (Details) - Quarterly Financial Information (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Quarterly Financial Information [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 153,611 us-gaap_Revenues | $ 189,275 us-gaap_Revenues | $ 194,806 us-gaap_Revenues | $ 134,538 us-gaap_Revenues | $ 125,916 us-gaap_Revenues | $ 185,935 us-gaap_Revenues | $ 133,350 us-gaap_Revenues | $ 111,035 us-gaap_Revenues | $ 672,230 us-gaap_Revenues | $ 556,236 us-gaap_Revenues | $ 630,507 us-gaap_Revenues
Gross profit | 3,697 us-gaap_GrossProfit | 8,356 us-gaap_GrossProfit | 12,499 us-gaap_GrossProfit | 7,869 us-gaap_GrossProfit | (23,053)us-gaap_GrossProfit | 8,359 us-gaap_GrossProfit | (16,635)us-gaap_GrossProfit | 1,385 us-gaap_GrossProfit | 32,421 us-gaap_GrossProfit | (29,944)us-gaap_GrossProfit | 47,472 us-gaap_GrossProfit
Income (loss) before income taxes and earnings attributable to noncontrolling interests | (5,875)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | (1,671)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 2,473 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 480 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | (37,333)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 1,715 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | (25,967)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | (7,219)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | (4,593)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | (68,804)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments |
Net income (loss) attributable to Sterling common stockholders | $ (7,251)us-gaap_NetIncomeLoss | $ (3,935)us-gaap_NetIncomeLoss | $ 1,200 us-gaap_NetIncomeLoss | $ 205 us-gaap_NetIncomeLoss | $ (52,135)us-gaap_NetIncomeLoss | $ (189)us-gaap_NetIncomeLoss | $ (17,025)us-gaap_NetIncomeLoss | $ (4,580)us-gaap_NetIncomeLoss | $ (9,781)us-gaap_NetIncomeLoss | $ (73,929)us-gaap_NetIncomeLoss | $ (297)us-gaap_NetIncomeLoss
Basic (in Dollars per share) | $ (0.39)us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic | $ (0.21)us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic | $ 0.07 us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic | $ 0.01 us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic | $ (3.52)us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic | $ (0.06)us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic | $ (0.93)us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic | $ (0.39)us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic | $ (0.54)us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic | $ (4.91)us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic |
Diluted (in Dollars per share) | $ (0.39)us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted | $ (0.21)us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted | $ 0.07 us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted | $ 0.01 us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted | $ (3.52)us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted | $ (0.06)us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted | $ (0.93)us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted | $ (0.39)us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted | $ (0.54)us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted | $ (4.91)us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted |

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