$STRL
STERLING INFRASTRUCTURE, INC. Stock $strl

$strl Overview Financials Valuation SEC Filings Company Website

2017 Q4 Form 10-K Financial Statement

#000087423818000022 Filed on March 06, 2018

Income Statement

Concept	2017 Q4	2017 Q3	2017 Q2
Revenue	$253.9M	$304.2M	$246.4M
YoY Change	50.83%	47.95%	29.98%
Cost Of Revenue	$229.9M	$273.6M	$221.2M
YoY Change	42.44%	44.75%	27.1%
Gross Profit	$23.97M	$30.63M	$25.21M
YoY Change	277.76%	84.28%	62.16%
Gross Profit Margin	9.44%	10.07%	10.23%
Selling, General & Admin	$11.80M	$13.10M	$12.80M
YoY Change	25.53%	36.46%	47.13%
% of Gross Profit	49.23%	42.77%	50.78%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$3.900M	$4.700M	$4.300M
YoY Change	0.0%	17.5%	10.26%
% of Gross Profit	16.27%	15.34%	17.06%
Operating Expenses	$17.00M	$18.00M	$16.80M
YoY Change	38.21%	34.33%	37.7%
Operating Profit	$6.969M	$12.64M	$8.356M
YoY Change	-217.03%	244.2%	147.15%
Interest Expense	-$3.000M	-$3.500M	-$2.900M
YoY Change	650.0%	600.0%	262.5%
% of Operating Profit	-43.05%	-27.69%	-34.71%
Other Income/Expense, Net
YoY Change
Pretax Income	$3.963M	$9.170M	$4.661M
YoY Change	-168.87%	186.92%	81.36%
Income Tax	-$19.90M	$344.0K	$98.00K
% Of Pretax Income	-502.14%	3.75%	2.1%
Net Earnings	$3.100M	$8.826M	$4.563M
YoY Change	-149.21%	265.47%	125.56%
Net Earnings / Revenue	1.22%	2.9%	1.85%
Basic Earnings Per Share	$0.11	$0.27	$0.14
Diluted Earnings Per Share	$0.11	$0.26	$0.13
COMMON SHARES
Basic Shares Outstanding	27.05M shares	26.49M shares	26.98M shares
Diluted Shares Outstanding		26.92M shares	27.34M shares

Balance Sheet

Concept	2017 Q4	2017 Q3	2017 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$84.00M	$66.50M	$60.10M
YoY Change	96.26%	54.65%	41.08%
Cash & Equivalents	$83.95M	$66.54M	$60.06M
Short-Term Investments
Other Short-Term Assets	$7.529M	$9.654M	$11.21M
YoY Change	38.2%	56.47%	106.45%
Inventory	$4.621M	$2.093M	$3.521M
Prepaid Expenses
Receivables	$133.9M	$149.1M	$137.9M
Other Receivables	$11.40M	$9.000M	$7.500M
Total Short-Term Assets	$278.5M	$279.8M	$260.7M
YoY Change	58.34%	39.85%	29.64%
LONG-TERM ASSETS
Property, Plant & Equipment	$54.41M	$59.46M	$61.28M
YoY Change	-20.14%	-15.49%	-14.94%
Goodwill	$85.20M	$85.28M	$90.97M
YoY Change	55.42%	55.56%	65.94%
Intangibles	$44.82M	$45.20M	$39.49M
YoY Change
Long-Term Investments
YoY Change
Other Assets	$317.0K	$3.301M	$2.968M
YoY Change	-89.32%	11.22%	0.0%
Total Long-Term Assets	$184.8M	$193.2M	$194.7M
YoY Change	46.74%	50.79%	49.98%
TOTAL ASSETS
Total Short-Term Assets	$278.5M	$279.8M	$260.7M
Total Long-Term Assets	$184.8M	$193.2M	$194.7M
Total Assets	$463.3M	$473.0M	$455.5M
YoY Change	53.5%	44.12%	37.61%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$97.46M	$100.6M	$89.47M
YoY Change	45.25%	30.84%	12.04%
Accrued Expenses	$9.348M	$15.19M	$7.699M
YoY Change	52.0%	173.9%	58.12%
Deferred Revenue	$62.37M
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$3.978M	$986.0K	$1.039M
YoY Change	3.46%	-78.81%	-78.59%
Total Short-Term Liabilities	$182.3M	$195.0M	$187.3M
YoY Change	24.35%	22.28%	19.03%
LONG-TERM LIABILITIES
Long-Term Debt	$86.16M	$88.62M	$88.13M
YoY Change	5462.3%	1174.73%	575.6%
Other Long-Term Liabilities	$1.271M	$46.90M	$46.80M
YoY Change	-97.21%	-1.05%	-5.65%
Total Long-Term Liabilities	$134.8M	$135.5M	$134.9M
YoY Change	185.99%	149.49%	115.25%
TOTAL LIABILITIES
Total Short-Term Liabilities	$182.3M	$195.0M	$187.3M
Total Long-Term Liabilities	$134.8M	$135.5M	$134.9M
Total Liabilities	$317.1M	$330.5M	$322.3M
YoY Change	63.68%	54.61%	46.44%
SHAREHOLDERS EQUITY
Retained Earnings	-$90.12M	-$93.20M	-$100.3M
YoY Change	-11.42%	-2.29%	2.58%
Common Stock	$271.0K	$270.0K	$270.0K
YoY Change	8.4%	8.0%	8.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$0.00
YoY Change
Treasury Stock Shares	0.000 shares
Shareholders Equity	$141.3M	$138.9M	$131.3M
YoY Change
Total Liabilities & Shareholders Equity	$463.3M	$473.0M	$455.5M
YoY Change	53.5%	44.12%	37.61%

Cashflow Statement

Concept	2017 Q4	2017 Q3	2017 Q2
OPERATING ACTIVITIES
Net Income	$3.100M	$8.826M	$4.563M
YoY Change	-149.21%	265.47%	125.56%
Depreciation, Depletion And Amortization	$3.900M	$4.700M	$4.300M
YoY Change	0.0%	17.5%	10.26%
Cash From Operating Activities	$31.80M	$5.300M	-$9.200M
YoY Change	261.36%	-41.11%	-135.52%
INVESTING ACTIVITIES
Capital Expenditures	-$1.100M	-$2.400M	-$4.100M
YoY Change	-45.0%	-14.29%	24.24%
Acquisitions
YoY Change
Other Investing Activities	$2.500M	$4.100M	-$53.70M
YoY Change	400.0%	412.5%	-7771.43%
Cash From Investing Activities	$1.400M	$1.700M	-$57.80M
YoY Change	-193.33%	-185.0%	2123.08%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-15.70M	-600.0K	89.90M
YoY Change	106.58%	-90.91%	1943.18%
NET CHANGE
Cash From Operating Activities	31.80M	5.300M	-9.200M
Cash From Investing Activities	1.400M	1.700M	-57.80M
Cash From Financing Activities	-15.70M	-600.0K	89.90M
Net Change In Cash	17.50M	6.400M	22.90M
YoY Change	-5933.33%	1500.0%	-17.33%
FREE CASH FLOW
Cash From Operating Activities	$31.80M	$5.300M	-$9.200M
Capital Expenditures	-$1.100M	-$2.400M	-$4.100M
Free Cash Flow	$32.90M	$7.700M	-$5.100M
YoY Change	204.63%	-34.75%	-117.47%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2017	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2017	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2017	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2017
CY2017	dei	Document Period End Date DocumentPeriodEndDate	2017-12-31
CY2017	dei	Document Type DocumentType	10-K
CY2017	dei	Entity Central Index Key EntityCentralIndexKey	0000874238
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CY2017	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2017	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
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CY2017Q2	dei	Entity Public Float EntityPublicFloat	336753702	USD
CY2017	dei	Entity Registrant Name EntityRegistrantName	STERLING CONSTRUCTION CO INC
CY2017	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2017	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
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CY2016Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2017Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2016Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2017Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2016Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	28000000	shares
CY2017Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	38000000	shares
CY2016Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	24987306	shares
CY2017Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	27051468	shares
CY2016Q4	us-gaap	Common Stock Value CommonStockValue	250000	USD
CY2017Q4	us-gaap	Common Stock Value CommonStockValue	271000	USD
CY2015	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-35859000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-7412000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	15817000	USD
CY2016Q4	us-gaap	Contract Receivable Retainage ContractReceivableRetainage	23400000	USD
CY2017Q4	us-gaap	Contract Receivable Retainage ContractReceivableRetainage	43500000	USD
CY2015	us-gaap	Cost Of Goods Sold CostOfGoodsSold	595944000	USD
CY2016	us-gaap	Cost Of Goods Sold CostOfGoodsSold	648065000	USD
CY2017	us-gaap	Cost Of Goods Sold CostOfGoodsSold	868866000	USD
CY2016Q4	us-gaap	Costs In Excess Of Billings On Uncompleted Contracts Or Programs Expected To Be Collected Within One Year CostsInExcessOfBillingsOnUncompletedContractsOrProgramsExpectedToBeCollectedWithinOneYear	32705000	USD
CY2017Q4	us-gaap	Costs In Excess Of Billings On Uncompleted Contracts Or Programs Expected To Be Collected Within One Year CostsInExcessOfBillingsOnUncompletedContractsOrProgramsExpectedToBeCollectedWithinOneYear	37112000	USD
CY2015	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	7000	USD
CY2016	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	88000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	118000	USD
CY2017Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	90138000	USD
CY2016Q4	us-gaap	Deferred Finance Costs Current Net DeferredFinanceCostsCurrentNet	803000	USD
CY2017Q4	us-gaap	Deferred Finance Costs Current Net DeferredFinanceCostsCurrentNet	0	USD
CY2015	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	0	USD
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	0	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	0	USD
CY2016Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	11494000	USD
CY2017Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	7249000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	482000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	312000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	3909000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	1133000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	69528000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	43794000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	0	USD
CY2017Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	0	USD
CY2016Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	11494000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	7249000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	41942000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	26015000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	4490000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	3417000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Contingencies DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsContingencies	16620000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Contingencies DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsContingencies	11269000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	58034000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	36545000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	23000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	588000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	11471000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	6661000	USD
CY2015	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	1800000	USD
CY2016	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	1800000	USD
CY2017	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	2300000	USD
CY2015	us-gaap	Depreciation Depreciation	16200000	USD
CY2016	us-gaap	Depreciation Depreciation	15700000	USD
CY2017	us-gaap	Depreciation Depreciation	15100000	USD
CY2015	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	16236000	USD
CY2016	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	15699000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	16994000	USD
CY2015	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-2.02
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.40
CY2017Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.09
CY2017Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.14
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.27
CY2017Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.11
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.44
CY2016Q1	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.37
CY2016Q2	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.09
CY2016Q3	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.10
CY2016Q4	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.25
CY2016	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.40
CY2015	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-2.02
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.40
CY2017Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.09
CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.13
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.26
CY2017Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.11
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.43
CY2015	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.000
CY2016	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.013
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.008
CY2015	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2016	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.3499843113
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.584
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.945
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-1.130
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0.000
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0.000
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	1.227
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary EffectiveIncomeTaxRateReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	-0.153
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary EffectiveIncomeTaxRateReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	-0.517
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary EffectiveIncomeTaxRateReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	0.345
CY2015	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.050
CY2016	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.015
CY2017	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	-0.017
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	-0.032
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	-0.172
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.022
CY2016Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	5322000	USD
CY2017Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	9054000	USD
CY2017Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	1600000	USD
CY2017	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P3Y4M24D
CY2017Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1799000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	2400000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	2200000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	2400000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	2400000	USD
CY2017	us-gaap	Gross Profit GrossProfit	89092000	USD
CY2015	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	2400000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	46617000	USD
CY2015	us-gaap	Gain Loss On Sale Of Derivatives GainLossOnSaleOfDerivatives	107000	USD
CY2016	us-gaap	Gain Loss On Sale Of Derivatives GainLossOnSaleOfDerivatives	0	USD
CY2017	us-gaap	Gain Loss On Sale Of Derivatives GainLossOnSaleOfDerivatives	0	USD
CY2015	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	1479000	USD
CY2016	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	367000	USD
CY2017	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-171000	USD
CY2015	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-240000	USD
CY2016	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2017	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-755000	USD
CY2015	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	40466000	USD
CY2016	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	36844000	USD
CY2017	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	48351000	USD
CY2016Q4	us-gaap	Goodwill Goodwill	54800000	USD
CY2016Q4	us-gaap	Goodwill Goodwill	54820000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	85231000	USD
CY2015	us-gaap	Gross Profit GrossProfit	27651000	USD
CY2016Q1	us-gaap	Gross Profit GrossProfit	3548000	USD
CY2016Q2	us-gaap	Gross Profit GrossProfit	15543000	USD
CY2016Q3	us-gaap	Gross Profit GrossProfit	16622000	USD
CY2016Q4	us-gaap	Gross Profit GrossProfit	6345000	USD
CY2016	us-gaap	Gross Profit GrossProfit	42058000	USD
CY2017Q1	us-gaap	Gross Profit GrossProfit	9287000	USD
CY2017Q2	us-gaap	Gross Profit GrossProfit	25205000	USD
CY2017Q3	us-gaap	Gross Profit GrossProfit	30631000	USD
CY2017Q4	us-gaap	Gross Profit GrossProfit	23969000	USD
CY2016	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2017	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2016Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-7336000	USD
CY2017Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	4661000	USD
CY2017Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	9170000	USD
CY2017Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	3963000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	15935000	USD
CY2015	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	88000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	118000	USD
CY2015	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	10036000	USD
CY2016	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	6919000	USD
CY2017	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-18006000	USD
CY2016Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	2570000	USD
CY2016Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	3196000	USD
CY2016Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-5754000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-7324000	USD
CY2017Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-1859000	USD
CY2015	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2016	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2017	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	19545000	USD
CY2015	us-gaap	Income Tax Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary IncomeTaxReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	2620000	USD
CY2016	us-gaap	Income Tax Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary IncomeTaxReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	3786000	USD
CY2017	us-gaap	Income Tax Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary IncomeTaxReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	5504000	USD
CY2015	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-6013000	USD
CY2016	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-2563000	USD
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	5577000	USD
CY2015	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	15000	USD
CY2016	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	56000	USD
CY2017	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	92000	USD
CY2015	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-860000	USD
CY2016	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-113000	USD
CY2017	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-264000	USD
CY2015	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	551000	USD
CY2016	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	1258000	USD
CY2017	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	349000	USD
CY2015	us-gaap	Income Taxes Paid IncomeTaxesPaid	547000	USD
CY2016	us-gaap	Income Taxes Paid IncomeTaxesPaid	72000	USD
CY2017	us-gaap	Income Taxes Paid IncomeTaxesPaid	279000	USD
CY2015	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-7834000	USD
CY2016	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	8138000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	13579000	USD
CY2015	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-3147000	USD
CY2016	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	319000	USD
CY2017	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	7430000	USD
CY2015	us-gaap	Increase Decrease In Billing In Excess Of Cost Of Earnings IncreaseDecreaseInBillingInExcessOfCostOfEarnings	4907000	USD
CY2016	us-gaap	Increase Decrease In Billing In Excess Of Cost Of Earnings IncreaseDecreaseInBillingInExcessOfCostOfEarnings	33544000	USD
CY2017	us-gaap	Increase Decrease In Billing In Excess Of Cost Of Earnings IncreaseDecreaseInBillingInExcessOfCostOfEarnings	-2029000	USD
CY2015	us-gaap	Increase Decrease In Contract Receivables Net IncreaseDecreaseInContractReceivablesNet	3216000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	463298000	USD
CY2016Q4	us-gaap	Liabilities Current LiabilitiesCurrent	146592000	USD
CY2016	us-gaap	Increase Decrease In Contract Receivables Net IncreaseDecreaseInContractReceivablesNet	2020000	USD
CY2017	us-gaap	Increase Decrease In Contract Receivables Net IncreaseDecreaseInContractReceivablesNet	29923000	USD
CY2015	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	-1419000	USD
CY2015	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-4866000	USD
CY2016	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	1173000	USD
CY2017	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-305000	USD
CY2015	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-8127000	USD
CY2016	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-595000	USD
CY2017	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-624000	USD
CY2015	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	4945000	USD
CY2016	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	0	USD
CY2017	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	0	USD
CY2015	us-gaap	Increase Decrease In Unbilled Receivables IncreaseDecreaseInUnbilledReceivables	-6498000	USD
CY2016	us-gaap	Increase Decrease In Unbilled Receivables IncreaseDecreaseInUnbilledReceivables	5800000	USD
CY2017	us-gaap	Increase Decrease In Unbilled Receivables IncreaseDecreaseInUnbilledReceivables	1463000	USD
CY2016Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	0	USD
CY2017Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	44818000	USD
CY2015	us-gaap	Interest Income Other InterestIncomeOther	460000	USD
CY2016	us-gaap	Interest Income Other InterestIncomeOther	33000	USD
CY2017	us-gaap	Interest Income Other InterestIncomeOther	314000	USD
CY2015	us-gaap	Interest Paid InterestPaid	2889000	USD
CY2016	us-gaap	Interest Paid InterestPaid	2628000	USD
CY2017	us-gaap	Interest Paid InterestPaid	9800000	USD
CY2016Q4	us-gaap	Inventory Net InventoryNet	3708000	USD
CY2017Q4	us-gaap	Inventory Net InventoryNet	4621000	USD
CY2015	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	1500000	USD
CY2016	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	4700000	USD
CY2017	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	5000000	USD
CY2016Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	301823000	USD
CY2017Q4	us-gaap	Liabilities Current LiabilitiesCurrent	182292000	USD
CY2016Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	47141000	USD
CY2017Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	134817000	USD
CY2016Q4	us-gaap	Liabilities Other Than Longterm Debt Noncurrent LiabilitiesOtherThanLongtermDebtNoncurrent	362000	USD
CY2017Q4	us-gaap	Liabilities Other Than Longterm Debt Noncurrent LiabilitiesOtherThanLongtermDebtNoncurrent	1271000	USD
CY2016Q4	us-gaap	Long Term Debt LongTermDebt	5394000	USD
CY2017Q4	us-gaap	Long Term Debt LongTermDebt	90138000	USD
CY2016Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	3845000	USD
CY2017Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	3978000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	0	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	3978000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	73150000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	6000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	10370000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	2634000	USD
CY2016Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1549000	USD
CY2017Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	86160000	USD
CY2016Q4	us-gaap	Minority Interest MinorityInterest	656000	USD
CY2017Q4	us-gaap	Minority Interest MinorityInterest	4856000	USD
CY2015	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	3402000	USD
CY2016	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	1079000	USD
CY2017	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	0	USD
CY2014Q4	us-gaap	Minority Interest In Joint Ventures MinorityInterestInJointVentures	7462000	USD
CY2015Q4	us-gaap	Minority Interest In Joint Ventures MinorityInterestInJointVentures	-91000	USD
CY2016Q4	us-gaap	Minority Interest In Joint Ventures MinorityInterestInJointVentures	656000	USD
CY2017Q4	us-gaap	Minority Interest In Joint Ventures MinorityInterestInJointVentures	4856000	USD
CY2015	us-gaap	Multiemployer Plan Contributions By Employer MultiemployerPlanContributionsByEmployer	1500000	USD
CY2016	us-gaap	Multiemployer Plan Contributions By Employer MultiemployerPlanContributionsByEmployer	1200000	USD
CY2017	us-gaap	Multiemployer Plan Contributions By Employer MultiemployerPlanContributionsByEmployer	1500000	USD
CY2015	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-22605000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	2608000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	74056000	USD
CY2015	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-4488000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-8174000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-55897000	USD
CY2015	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	8676000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	43925000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	23009000	USD
CY2015	us-gaap	Net Income Loss NetIncomeLoss	-20402000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	-9238000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	11617000	USD
CY2015	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	3216000	USD
CY2016	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	1826000	USD
CY2017	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	4200000	USD
CY2015	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-39176000	USD
CY2016Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-7328000	USD
CY2016Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2023000	USD
CY2016Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2415000	USD
CY2016Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-6348000	USD
CY2016	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-9238000	USD
CY2017Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-2257000	USD
CY2017Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	3662000	USD
CY2017Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	7132000	USD
CY2017Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	3080000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	11617000	USD
CY2015	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	2662000	USD
CY2016	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	740000	USD
CY2017	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	70000	USD
CY2015	us-gaap	Noncontrolling Interest In Net Income Loss Other Noncontrolling Interests Redeemable NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsRedeemable	3216000	USD
CY2016	us-gaap	Noncontrolling Interest In Net Income Loss Other Noncontrolling Interests Redeemable NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsRedeemable	1826000	USD
CY2017	us-gaap	Noncontrolling Interest In Net Income Loss Other Noncontrolling Interests Redeemable NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsRedeemable	4200000	USD
CY2017	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	2	segment
CY2017	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	segment
CY2017	us-gaap	Number Of Reporting Units NumberOfReportingUnits	2	reporting_unit
CY2015	us-gaap	Operating Income Loss OperatingIncomeLoss	-14387000	USD
CY2016	us-gaap	Operating Income Loss OperatingIncomeLoss	-4729000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	26176000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	11301000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	4086000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	441000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	1484000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	2303000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	2987000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	0	USD
CY2016Q4	us-gaap	Other Assets Current OtherAssetsCurrent	5448000	USD
CY2017Q4	us-gaap	Other Assets Current OtherAssetsCurrent	7529000	USD
CY2016Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	2968000	USD
CY2017Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	317000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	101000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	0	USD
CY2015	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-6000	USD
CY2016	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	0	USD
CY2017	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	0	USD
CY2015	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	-1572000	USD
CY2016	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	-9943000	USD
CY2017	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	-14565000	USD
CY2015	us-gaap	Other Significant Noncash Transaction Value Of Consideration Given1 OtherSignificantNoncashTransactionValueOfConsiderationGiven1	0	USD
CY2016	us-gaap	Other Significant Noncash Transaction Value Of Consideration Given1 OtherSignificantNoncashTransactionValueOfConsiderationGiven1	0	USD
CY2017	us-gaap	Other Significant Noncash Transaction Value Of Consideration Given1 OtherSignificantNoncashTransactionValueOfConsiderationGiven1	3500000	USD
CY2015	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	200000	USD
CY2017	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	800000	USD
CY2015	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	1309000	USD
CY2016	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	0	USD
CY2017	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	6871000	USD
CY2015	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2016	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2017	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	54861000	USD
CY2015	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	8086000	USD
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	10888000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	9420000	USD
CY2015	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	3402000	USD
CY2016	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	1079000	USD
CY2017	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	0	USD
CY2016Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2017Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2016Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	1000000	shares
CY2017Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	1000000	shares
CY2016Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2017Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2016Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2017Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2015	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2016	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	19142000	USD
CY2017	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2015	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-76000	USD
CY2016	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	191000	USD
CY2017	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	637000	USD
CY2015	us-gaap	Proceeds From Repayments Of Other Debt ProceedsFromRepaymentsOfOtherDebt	-3217000	USD
CY2016	us-gaap	Proceeds From Repayments Of Other Debt ProceedsFromRepaymentsOfOtherDebt	-677000	USD
CY2017	us-gaap	Proceeds From Repayments Of Other Debt ProceedsFromRepaymentsOfOtherDebt	-1178000	USD
CY2015	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	8543000	USD
CY2016	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	2714000	USD
CY2017	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	8384000	USD
CY2015	us-gaap	Profit Loss ProfitLoss	-35960000	USD
CY2016	us-gaap	Profit Loss ProfitLoss	-7412000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	15817000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	161273000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	153015000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	68127000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	54406000	USD
CY2015	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	0	USD
CY2016	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	0	USD
CY2017	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	0	USD
CY2016Q4	us-gaap	Receivables Long Term Contracts Or Programs ReceivablesLongTermContractsOrPrograms	84132000	USD
CY2017Q4	us-gaap	Receivables Long Term Contracts Or Programs ReceivablesLongTermContractsOrPrograms	133931000	USD
CY2015	us-gaap	Related Party Transaction Amounts Of Transaction RelatedPartyTransactionAmountsOfTransaction	200000	USD
CY2016	us-gaap	Related Party Transaction Amounts Of Transaction RelatedPartyTransactionAmountsOfTransaction	600000	USD
CY2017	us-gaap	Related Party Transaction Amounts Of Transaction RelatedPartyTransactionAmountsOfTransaction	200000	USD
CY2016Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-101738000	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-90121000	USD
CY2015	us-gaap	Revenues Revenues	623595000	USD
CY2016Q1	us-gaap	Revenues Revenues	126567000	USD
CY2016Q2	us-gaap	Revenues Revenues	189582000	USD
CY2016Q3	us-gaap	Revenues Revenues	205629000	USD
CY2016Q4	us-gaap	Revenues Revenues	168345000	USD
CY2016	us-gaap	Revenues Revenues	690123000	USD
CY2017Q1	us-gaap	Revenues Revenues	153416000	USD
CY2017Q2	us-gaap	Revenues Revenues	246412000	USD
CY2017Q3	us-gaap	Revenues Revenues	304219000	USD
CY2017Q4	us-gaap	Revenues Revenues	253911000	USD
CY2017	us-gaap	Revenues Revenues	957958000	USD
CY2015	us-gaap	Share Based Compensation ShareBasedCompensation	1604000	USD
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	1810000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	2843000	USD
CY2017	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	17061000	USD
CY2016	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	19142000	USD
CY2015	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	1604000	USD
CY2016	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	1810000	USD
CY2017	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	2843000	USD
CY2016	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	18229	shares
CY2017	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	65952	shares
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	107434000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	141333000	USD
CY2014Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	141148000	USD
CY2015Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	95754000	USD
CY2016Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	108090000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	146189000	USD
CY2017Q4	us-gaap	Tax Credit Carryforward Amount TaxCreditCarryforwardAmount	146000	USD
CY2016Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	0	shares
CY2017Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	0	shares
CY2016Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	0	USD
CY2017Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	0	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	0	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	0	USD
CY2015	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
CY2016	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
CY2017	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	438000	shares
CY2015	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	19375000	shares
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	23140000	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	26712000	shares
CY2015	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	19375000	shares
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	23140000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	26274000	shares
CY2017	us-gaap	Revenue Recognition Percentage Of Completion Method RevenueRecognitionPercentageOfCompletionMethod	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">Revenue Recognition</font></div><div style="line-height:120%;padding-bottom:8px;padding-top:4px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;text-decoration:underline;">Heavy Civil Construction</font><font style="font-family:inherit;font-size:10pt;font-style:italic;"> - </font><font style="font-family:inherit;font-size:10pt;">The Company engages in various types of heavy civil construction projects principally for public (government) owners. Credit risk is minimal with public owners since the Company ascertains that funds have been appropriated by the governmental project owner prior to commencing work on such projects. While most public contracts are subject to termination at the election of the government entity, in the event of termination the Company is entitled to receive the contract price for completed work and reimbursement of termination-related costs plus a margin. Credit risk with private owners is minimized because of statutory mechanic’s liens, which give the Company high priority in the event of lien foreclosures following financial difficulties of private owners.</font></div><div style="line-height:120%;padding-bottom:2px;padding-top:6px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> Our contracts generally take </font><font style="font-family:inherit;font-size:10pt;">12</font><font style="font-family:inherit;font-size:10pt;"> to </font><font style="font-family:inherit;font-size:10pt;">36</font><font style="font-family:inherit;font-size:10pt;"> months to complete. The Company generally provides a </font><font style="font-family:inherit;font-size:10pt;">one</font><font style="font-family:inherit;font-size:10pt;">- to </font><font style="font-family:inherit;font-size:10pt;">two</font><font style="font-family:inherit;font-size:10pt;">-year warranty for workmanship under its contracts when completed. Warranty claims historically have been insignificant.</font></div><div style="line-height:120%;padding-bottom:2px;padding-top:6px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> The asset, “Costs and estimated earnings in excess of billings on uncompleted contracts” represents revenues recognized in excess of amounts billed on these contracts and will be billed at a later date, usually due to contract terms. In addition, revenue associated with unapproved change orders and claims is also included when realization is probable and amounts can be reliably determined. The liability, “Billings in excess of costs and estimated earnings on uncompleted contracts” represents billings in excess of revenues recognized on these contracts.</font></div><div style="line-height:120%;text-align:justify;text-indent:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;text-indent:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Revenues are recognized on the percentage-of-completion method, measured by the ratio of costs incurred up to a given date to estimated total costs for each contract. This cost to cost measure is used because management considers it to be the best available measure of progress on these contracts. Contract costs include all direct material, labor, subcontract and other costs and those indirect costs related to contract performance, such as indirect salaries and wages, equipment repairs and depreciation, insurance and payroll taxes. Administrative and general expenses are charged to expense as incurred. Provisions for estimated losses on uncompleted contracts are made in the period in which such losses are determined. Changes in job performance, job conditions and estimated profitability, including those changes arising from contract penalty provisions and final contract settlements may result in revisions to costs and income and are recognized in the period in which the revisions are determined.</font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;text-indent:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Changes in estimated revenues and gross margin during the year ended December 31, 2017 resulted in a net gain of </font><font style="font-family:inherit;font-size:10pt;">$0.9 million</font><font style="font-family:inherit;font-size:10pt;"> included in operating income. Changes in estimated revenues and gross margin during the year ended </font><font style="font-family:inherit;font-size:10pt;">December 31, 2016</font><font style="font-family:inherit;font-size:10pt;"> resulted in a net charge of </font><font style="font-family:inherit;font-size:10pt;">$6.3 million</font><font style="font-family:inherit;font-size:10pt;"> included in operating loss. Changes in estimated revenues and gross margin during the year ended </font><font style="font-family:inherit;font-size:10pt;">December 31, 2015</font><font style="font-family:inherit;font-size:10pt;"> resulted in a net charge of </font><font style="font-family:inherit;font-size:10pt;">$9.7 million</font><font style="font-family:inherit;font-size:10pt;"> included in operating loss.</font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div><div style="line-height:120%;text-align:justify;text-indent:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Change orders are modifications of an original contract that effectively change the existing provisions of the contract without adding new provisions or terms. Change orders may include changes in specifications or designs, manner of performance, facilities, equipment, materials, sites and period of completion of the work. Either we or our customers may initiate change orders.</font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;text-indent:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The Company considers unapproved change orders to be contract variations for which we have customer approval for a change of scope but a price change associated with the scope change has not yet been agreed upon. Costs associated with unapproved change orders are included in the estimated costs to complete the contracts and are treated as project costs as incurred. The Company recognizes revenue equal to costs incurred on unapproved change orders when realization of price approval is probable. Unapproved change orders involve the use of estimates, and it is reasonably possible that revisions to the estimated costs and recoverable amounts may be required in future reporting periods to reflect changes in estimates or final agreements with customers. Change orders that are unapproved as to both price and scope are evaluated as claims.</font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;text-indent:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The Company considers claims to be amounts in excess of approved contract prices that we seek to collect from our customers or others for customer-caused delays, errors in specifications and designs, contract terminations, change orders that are either in dispute or are unapproved as to both scope and price, or other causes of unanticipated additional contract costs. Claims are included in the calculation of revenue when realization is probable and amounts can be reliably determined to the extent costs are incurred. To support these requirements, the existence of the following items must be satisfied: (i) the contract or other evidence provides a legal basis for the claim; or a legal opinion has been obtained, stating that under the circumstances there is a reasonable basis to support the claim; (ii) additional costs are caused by circumstances that were unforeseen at the contract date and are not the result of deficiencies in the contractor’s performance; (iii) costs associated with the claim are identifiable or otherwise determinable and are reasonable in view of the work performed; and (iv) the evidence supporting the claim is objective and verifiable, not based on management’s feel for the situation or on unsupported representations. Revenue in excess of contract costs incurred on claims is recognized when an agreement is reached with customers as to the value of the claims, which in some instances may not occur until after completion of work under the contract. Costs associated with claims are included in the estimated costs to complete the contracts and are treated as project costs when incurred. </font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font><font style="font-family:inherit;font-size:10pt;">The Company has projects where we are in the process of negotiating, or awaiting final approval of, unapproved change orders and claims with our customers. The Company is proceeding with its contractual rights to recoup additional costs incurred from its customers based on completing work associated with change orders, including change orders with pending change order pricing, or claims related to significant changes in scope which resulted in substantial delays and additional costs in completing the work. Unapproved change order and claim information has been provided to our customers and negotiations with the customers are ongoing. If additional progress with an acceptable resolution is not reached, legal action will be taken.  </font></div><div style="line-height:120%;text-align:justify;text-indent:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;text-indent:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Based upon our review of the provisions of our contracts, specific costs incurred and other related evidence supporting the unapproved change orders, claims and our entitled unpaid project price, together with the views of the Company’s outside claim consultants, we included the unapproved change orders, claims and entitled unpaid project price amounts of </font><font style="font-family:inherit;font-size:10pt;">$5.0 million</font><font style="font-family:inherit;font-size:10pt;">, </font><font style="font-family:inherit;font-size:10pt;">$5.0 million</font><font style="font-family:inherit;font-size:10pt;"> and </font><font style="font-family:inherit;font-size:10pt;">$0.0 million</font><font style="font-family:inherit;font-size:10pt;">, respectively, at </font><font style="font-family:inherit;font-size:10pt;">December 31, 2017</font><font style="font-family:inherit;font-size:10pt;">, and </font><font style="font-family:inherit;font-size:10pt;">$2.2 million</font><font style="font-family:inherit;font-size:10pt;">, </font><font style="font-family:inherit;font-size:10pt;">$9.2 million</font><font style="font-family:inherit;font-size:10pt;"> and </font><font style="font-family:inherit;font-size:10pt;">$3.9 million</font><font style="font-family:inherit;font-size:10pt;">, respectively, at </font><font style="font-family:inherit;font-size:10pt;">December 31, 2016</font><font style="font-family:inherit;font-size:10pt;">, in “Costs and estimated earnings in excess of billings on uncompleted contracts” on our consolidated balance sheets.</font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;text-indent:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">We expect these matters will be resolved without a material adverse effect on our financial statements. However, unapproved change order and claim amounts are subject to negotiations which may cause actual results to differ materially from estimated and recorded amounts.</font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;padding-bottom:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;text-decoration:underline;">Residential Construction</font><font style="font-family:inherit;font-size:10pt;font-style:italic;"> - </font><font style="font-family:inherit;font-size:10pt;">Residential construction revenue and related profit are recognized when construction on the concrete foundation unit is completed. The time from starting construction to finishing is typically less than one month.</font></div></div>
CY2017	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:8px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">Use of Estimates - </font><font style="font-family:inherit;font-size:10pt;">The preparation of the accompanying</font><font style="font-family:inherit;font-size:10pt;"> </font><font style="font-family:inherit;font-size:10pt;">consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Certain of the Company’s accounting policies require higher degrees of judgment than others in their application. These include the recognition of revenue and earnings from construction contracts under the percentage-of-completion method, the valuation of long-term assets, income taxes, and purchase accounting, including intangibles and goodwill. Management continually evaluates all of its estimates and judgments based on available information and experience; however, actual results could differ from these estimates.</font></div></div>

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0000874238-18-000022.txt	Edgar Link	pending
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STERLING INFRASTRUCTURE, INC. Stock $strl

2017 Q4 Form 10-K Financial Statement

#000087423818000022 Filed on March 06, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$STRL STERLING INFRASTRUCTURE, INC. Stock $strl

2017 Q4 Form 10-K Financial Statement

#000087423818000022 Filed on March 06, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$STRL
STERLING INFRASTRUCTURE, INC. Stock $strl