$PRIM
Primoris Services Corp Stock $prim

$prim Overview Financials Valuation SEC Filings Company Website

2011 Q4 Form 10-K Financial Statement

#000110465913018371 Filed on March 07, 2013

Income Statement

Concept	2011 Q4	2011 Q2	2011 Q1
Revenue	$373.1M	$352.0M	$359.6M
YoY Change	11.96%	73.21%	105.51%
Cost Of Revenue	$322.0M	$310.6M	$319.0M
YoY Change	11.26%	75.85%	111.97%
Gross Profit	$51.05M	$41.41M	$40.63M
YoY Change	16.54%	55.45%	65.84%
Gross Profit Margin	13.68%	11.76%	11.3%
Selling, General & Admin	$25.80M	$20.48M	$19.85M
YoY Change	22.27%	29.41%	48.1%
% of Gross Profit	50.54%	49.45%	48.84%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$8.400M	$8.800M	$5.903M
YoY Change	-29.41%	57.14%	5.41%
% of Gross Profit	16.46%	21.25%	14.53%
Operating Expenses	$25.80M	$20.48M	$19.85M
YoY Change	21.7%	29.41%	47.0%
Operating Profit	$25.25M	$20.93M	$20.79M
YoY Change	11.71%	93.55%	88.95%
Interest Expense	-$4.300M	$1.353M	$1.371M
YoY Change	152.94%	10.9%	-1471.0%
% of Operating Profit	-17.03%	6.46%	6.6%
Other Income/Expense, Net	-$200.0K	-$306.0K	-$297.0K
YoY Change	-60.0%	2.0%	-1.0%
Pretax Income	$20.80M	$23.70M	$20.14M
YoY Change	1.46%	110.2%	88.2%
Income Tax	$8.300M	$9.236M	$7.859M
% Of Pretax Income	39.9%	38.97%	39.03%
Net Earnings	$12.47M	$14.46M	$12.28M
YoY Change	1.39%	103.69%	83.25%
Net Earnings / Revenue	3.34%	4.11%	3.41%
Basic Earnings Per Share	$0.24	$0.28	$0.25
Diluted Earnings Per Share	$0.24	$0.28	$0.24
COMMON SHARES
Basic Shares Outstanding	51.06M shares	51.04M shares	49.68M shares
Diluted Shares Outstanding	51.29M shares	51.15M shares	51.05M shares

Balance Sheet

Concept	2011 Q4	2011 Q2	2011 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments	$143.3M	$158.3M	$154.4M
YoY Change	1.34%	31.59%	37.49%
Cash & Equivalents	$120.3M	$135.3M	$131.4M
Short-Term Investments	$23.00M	$23.00M	$23.00M
Other Short-Term Assets	$55.40M	$38.40M	$34.10M
YoY Change	58.29%	40.66%	50.88%
Inventory	$31.93M	$28.74M	$47.70M
Prepaid Expenses
Receivables	$186.7M	$154.7M	$146.6M
Other Receivables	$700.0K	$400.0K	$200.0K
Total Short-Term Assets	$459.9M	$414.0M	$383.0M
YoY Change	7.59%	32.92%	30.54%
LONG-TERM ASSETS
Property, Plant & Equipment	$129.6M	$121.0M	$121.0M
YoY Change	5.26%	24.33%	33.41%
Goodwill	$94.18M	$94.18M
YoY Change	0.0%
Intangibles	$32.02M	$35.10M
YoY Change	-21.19%
Long-Term Investments	$12.69M	$18.00M	$18.50M
YoY Change	-32.53%	480.65%	740.91%
Other Assets
YoY Change
Total Long-Term Assets	$268.5M	$268.3M	$271.6M
YoY Change	-2.98%	41.28%	47.77%
TOTAL ASSETS
Total Short-Term Assets	$459.9M	$414.0M	$383.0M
Total Long-Term Assets	$268.5M	$268.3M	$271.6M
Total Assets	$728.4M	$682.3M	$654.6M
YoY Change	3.44%	36.08%	37.18%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$106.7M	$90.79M	$82.20M
YoY Change	19.27%	40.97%	24.73%
Accrued Expenses	$59.92M	$66.60M	$54.30M
YoY Change	7.28%	72.54%	50.83%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$13.87M	$27.60M	$28.10M
YoY Change	44.13%	15.97%	43.37%
Total Short-Term Liabilities	$345.0M	$357.8M	$334.3M
YoY Change	-9.58%	45.79%	41.65%
LONG-TERM LIABILITIES
Long-Term Debt	$55.85M	$33.11M	$61.30M
YoY Change	45.34%	-59.73%	-16.82%
Other Long-Term Liabilities	$10.88M	$1.862M	$11.70M
YoY Change	162.41%	-83.52%	2.63%
Total Long-Term Liabilities	$66.73M	$34.97M	$73.00M
YoY Change	56.74%	-62.6%	-14.22%
TOTAL LIABILITIES
Total Short-Term Liabilities	$345.0M	$357.8M	$334.3M
Total Long-Term Liabilities	$66.73M	$34.97M	$73.00M
Total Liabilities	$453.5M	$436.3M	$419.8M
YoY Change	-8.57%	27.76%	29.69%
SHAREHOLDERS EQUITY
Retained Earnings	$124.9M	$96.17M
YoY Change	73.55%
Common Stock	$150.0M	$5.000K
YoY Change	10.1%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$274.9M	$246.0M	$234.9M
YoY Change
Total Liabilities & Shareholders Equity	$728.4M	$682.3M	$654.6M
YoY Change	3.44%	36.08%	37.18%

Cashflow Statement

Concept	2011 Q4	2011 Q2	2011 Q1
OPERATING ACTIVITIES
Net Income	$12.47M	$14.46M	$12.28M
YoY Change	1.39%	103.69%	83.25%
Depreciation, Depletion And Amortization	$8.400M	$8.800M	$5.903M
YoY Change	-29.41%	57.14%	5.41%
Cash From Operating Activities	$14.30M	$21.20M	$30.70M
YoY Change	-80.08%	236.51%	-1635.0%
INVESTING ACTIVITIES
Capital Expenditures	-$12.20M	-$6.700M	$4.080M
YoY Change	110.34%	-40.18%	-256.92%
Acquisitions
YoY Change
Other Investing Activities	$1.000M	$800.0K	$3.200M
YoY Change	-105.32%	-123.53%	28.0%
Cash From Investing Activities	-$11.10M	-$5.900M	-$900.0K
YoY Change	-55.06%	-59.59%	800.0%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net			$822.0K
YoY Change			-76.51%
Debt Paid & Issued, Net			$2.364M
YoY Change
Cash From Financing Activities	21.40M	-11.40M	-13.90M
YoY Change	-262.12%	-191.94%	195.74%
NET CHANGE
Cash From Operating Activities	14.30M	21.20M	30.70M
Cash From Investing Activities	-11.10M	-5.900M	-900.0K
Cash From Financing Activities	21.40M	-11.40M	-13.90M
Net Change In Cash	24.60M	3.900M	15.90M
YoY Change	-27.43%	-4.88%	-333.82%
FREE CASH FLOW
Cash From Operating Activities	$14.30M	$21.20M	$30.70M
Capital Expenditures	-$12.20M	-$6.700M	$4.080M
Free Cash Flow	$26.50M	$27.90M	$26.62M
YoY Change	-65.85%	59.43%	4336.67%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2012	prim	Stock Issued Under Employee Stock Purchase Plans Restriction Period For Trade StockIssuedUnderEmployeeStockPurchasePlansRestrictionPeriodForTrade	P6M
CY2012	us-gaap	Stock Issued During Period Shares Share Based Compensation StockIssuedDuringPeriodSharesShareBasedCompensation	27675	shares
CY2011	us-gaap	Stock Issued During Period Shares Share Based Compensation StockIssuedDuringPeriodSharesShareBasedCompensation	14825	shares
CY2012	dei	Entity Registrant Name EntityRegistrantName	Primoris Services Corp
CY2012	dei	Entity Central Index Key EntityCentralIndexKey	0001361538
CY2012	dei	Document Type DocumentType	10-K
CY2012	dei	Document Period End Date DocumentPeriodEndDate	2012-12-31
CY2012	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2012	dei	Amendment Flag AmendmentFlag	false
CY2012	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2012	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
CY2013Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	51445439	shares
CY2012	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2012
CY2012	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2012	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2012	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2012Q2	dei	Entity Public Float EntityPublicFloat	395300000	USD
CY2011Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	120306000	USD
CY2011Q4	us-gaap	Restricted Cash And Investments Current RestrictedCashAndInvestmentsCurrent	31490000	USD
CY2011Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	187378000	USD
CY2011Q4	us-gaap	Costs In Excess Of Billings On Uncompleted Contracts Or Programs Expected To Be Collected Within One Year CostsInExcessOfBillingsOnUncompletedContractsOrProgramsExpectedToBeCollectedWithinOneYear	41866000	USD
CY2011Q4	us-gaap	Inventory Net InventoryNet	31926000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Net Current DeferredTaxAssetsNetCurrent	10659000	USD
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CY2012Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	157551000	USD
CY2012Q4	us-gaap	Short Term Investments ShortTermInvestments	3441000	USD
CY2012Q4	us-gaap	Restricted Cash And Investments Current RestrictedCashAndInvestmentsCurrent	35377000	USD
CY2012Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	268095000	USD
CY2012Q4	us-gaap	Costs In Excess Of Billings On Uncompleted Contracts Or Programs Expected To Be Collected Within One Year CostsInExcessOfBillingsOnUncompletedContractsOrProgramsExpectedToBeCollectedWithinOneYear	41701000	USD
CY2012Q4	us-gaap	Inventory Net InventoryNet	37193000	USD
CY2011	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	1460150000	USD
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CY2010	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	33616000	USD
CY2011	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	50707000	shares
CY2012Q4	us-gaap	Deferred Tax Assets Net Current DeferredTaxAssetsNetCurrent	10477000	USD
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CY2011Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	129649000	USD
CY2011Q4	us-gaap	Equity Method Investments EquityMethodInvestments	12687000	USD
CY2011Q4	us-gaap	Goodwill Goodwill	94179000	USD
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CY2012	us-gaap	Depreciation Depreciation	29080000	USD
CY2011	us-gaap	Depreciation Depreciation	24104000	USD
CY2010	us-gaap	Depreciation Depreciation	17904000	USD
CY2012	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	6543000	USD
CY2011	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	9699000	USD
CY2010	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	6580000	USD
CY2010	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	1732000	USD
CY2012	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	2752000	USD
CY2011	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-335000	USD
CY2010	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	1359000	USD
CY2012	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	1358000	USD
CY2011	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	10136000	USD
CY2010	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	9491000	USD
CY2012	prim	Increase Decrease In Deferred Tax Assets Liabilities Net IncreaseDecreaseInDeferredTaxAssetsLiabilitiesNet	879000	USD
CY2011	prim	Increase Decrease In Deferred Tax Assets Liabilities Net IncreaseDecreaseInDeferredTaxAssetsLiabilitiesNet	-7453000	USD
CY2010	prim	Increase Decrease In Deferred Tax Assets Liabilities Net IncreaseDecreaseInDeferredTaxAssetsLiabilitiesNet	1091000	USD
CY2012	prim	Increase Decrease In Customer Retention Deposits And Restricted Cash Current IncreaseDecreaseInCustomerRetentionDepositsAndRestrictedCashCurrent	3887000	USD
CY2011	prim	Increase Decrease In Customer Retention Deposits And Restricted Cash Current IncreaseDecreaseInCustomerRetentionDepositsAndRestrictedCashCurrent	18972000	USD
CY2010	prim	Increase Decrease In Customer Retention Deposits And Restricted Cash Current IncreaseDecreaseInCustomerRetentionDepositsAndRestrictedCashCurrent	5673000	USD
CY2012	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	52092000	USD
CY2011	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-20767000	USD
CY2010	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	42148000	USD
CY2012	us-gaap	Increase Decrease In Unbilled Receivables IncreaseDecreaseInUnbilledReceivables	-5426000	USD
CY2011	us-gaap	Increase Decrease In Unbilled Receivables IncreaseDecreaseInUnbilledReceivables	24591000	USD
CY2010	us-gaap	Increase Decrease In Unbilled Receivables IncreaseDecreaseInUnbilledReceivables	3765000	USD
CY2012	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	1341000	USD
CY2011	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	6654000	USD
CY2010	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	6837000	USD
CY2012	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	34338000	USD
CY2011	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	17241000	USD
CY2010	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	12391000	USD
CY2012	us-gaap	Increase Decrease In Billing In Excess Of Cost Of Earnings IncreaseDecreaseInBillingInExcessOfCostOfEarnings	20639000	USD
CY2011	us-gaap	Increase Decrease In Billing In Excess Of Cost Of Earnings IncreaseDecreaseInBillingInExcessOfCostOfEarnings	-67539000	USD
CY2010	us-gaap	Increase Decrease In Billing In Excess Of Cost Of Earnings IncreaseDecreaseInBillingInExcessOfCostOfEarnings	55825000	USD
CY2012	us-gaap	Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability	1435000	USD
CY2011	us-gaap	Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability	-2927000	USD
CY2010	us-gaap	Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability	-290000	USD
CY2012	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	3176000	USD
CY2011	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	3318000	USD
CY2010	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	5375000	USD
CY2012	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	2138000	USD
CY2011	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	6735000	USD
CY2010	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	4147000	USD
CY2012	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	98393000	USD
CY2011	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	39500000	USD
CY2010	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	81848000	USD
CY2012	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	37395000	USD
CY2011	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	29052000	USD
CY2010	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	23640000	USD
CY2012	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	9035000	USD
CY2011	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	3443000	USD
CY2010	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	2967000	USD
CY2012	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	6869000	USD
CY2011	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	36000000	USD
CY2010	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	44000000	USD
CY2012	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	26428000	USD
CY2011	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	39000000	USD
CY2010	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	48058000	USD
CY2010	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	18065000	USD
CY2010	prim	Payments For Acquisitions PaymentsForAcquisitions	39120000	USD
CY2010	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	19623000	USD
CY2012	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-95008000	USD
CY2011	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-22609000	USD
CY2010	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-54177000	USD
CY2012	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	94471000	USD
CY2011	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	44000000	USD
CY2010	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	27500000	USD
CY2012	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	9021000	USD
CY2011	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	6282000	USD
CY2010	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	4600000	USD
CY2012	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	26633000	USD
CY2011	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	22329000	USD
CY2010	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	12696000	USD
CY2012	us-gaap	Repayments Of Subordinated Debt RepaymentsOfSubordinatedDebt	17501000	USD
CY2011	us-gaap	Repayments Of Subordinated Debt RepaymentsOfSubordinatedDebt	20710000	USD
CY2010	us-gaap	Repayments Of Subordinated Debt RepaymentsOfSubordinatedDebt	27001000	USD
CY2011	us-gaap	Payments For Repurchase Of Other Equity PaymentsForRepurchaseOfOtherEquity	2030000	USD
CY2012	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1240000	USD
CY2010	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-390000	USD
CY2010Q3	us-gaap	Payments For Repurchase Of Warrants PaymentsForRepurchaseOfWarrants	277000	USD
CY2012	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1001000	USD
CY2012	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	7695000	USD
CY2011	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	5318000	USD
CY2010	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	4404000	USD
CY2010	us-gaap	Distribution Made To Member Or Limited Partner Cash Distributions Paid DistributionMadeToMemberOrLimitedPartnerCashDistributionsPaid	1966000	USD
CY2012	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	33860000	USD
CY2011	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-12022000	USD
CY2010	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-1364000	USD
CY2011Q4	us-gaap	Cash Fdic Insured Amount CashFDICInsuredAmount	87700000	USD
CY2012	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	111790	shares
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	1270744	shares
CY2012	us-gaap	Net Cash Provided By Used In Continuing Operations NetCashProvidedByUsedInContinuingOperations	37245000	USD
CY2011	us-gaap	Net Cash Provided By Used In Continuing Operations NetCashProvidedByUsedInContinuingOperations	4869000	USD
CY2010	us-gaap	Net Cash Provided By Used In Continuing Operations NetCashProvidedByUsedInContinuingOperations	25433000	USD
CY2012	us-gaap	Interest Paid InterestPaid	3004000	USD
CY2011	us-gaap	Interest Paid InterestPaid	4765000	USD
CY2010	us-gaap	Interest Paid InterestPaid	6131000	USD
CY2012	us-gaap	Income Taxes Paid IncomeTaxesPaid	31404000	USD
CY2011	us-gaap	Income Taxes Paid IncomeTaxesPaid	33600000	USD
CY2010	us-gaap	Income Taxes Paid IncomeTaxesPaid	26794000	USD
CY2010Q4	us-gaap	Business Acquisition Equity Interest Issued Or Issuable Value Assigned BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned	-13600000	USD
CY2010Q4	us-gaap	Business Combination Liabilities Arising From Contingencies Amount Recognized BusinessCombinationLiabilitiesArisingFromContingenciesAmountRecognized	-14272000	USD
CY2012	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	2932000	USD
CY2011	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	5312000	USD
CY2011Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	1532000	USD
CY2010Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	1234000	USD
CY2010Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	115437000	USD
CY2011Q4	us-gaap	Short Term Investments ShortTermInvestments	23000000	USD
CY2012Q4	us-gaap	Contract Receivable Due One Year Or Less ContractReceivableDueOneYearOrLess	227548000	USD
CY2011Q4	us-gaap	Contract Receivable Due One Year Or Less ContractReceivableDueOneYearOrLess	166298000	USD
CY2012Q4	us-gaap	Contract Receivable Retainage Due One Year Or Less ContractReceivableRetainageDueOneYearOrLess	39710000	USD
CY2011Q4	us-gaap	Contract Receivable Retainage Due One Year Or Less ContractReceivableRetainageDueOneYearOrLess	20378000	USD
CY2012Q4	us-gaap	Receivables Long Term Contracts Or Programs ReceivablesLongTermContractsOrPrograms	267258000	USD
CY2011Q4	us-gaap	Receivables Long Term Contracts Or Programs ReceivablesLongTermContractsOrPrograms	186676000	USD
CY2012Q4	us-gaap	Accounts And Other Receivables Net Current AccountsAndOtherReceivablesNetCurrent	837000	USD
CY2011Q4	us-gaap	Accounts And Other Receivables Net Current AccountsAndOtherReceivablesNetCurrent	702000	USD
CY2012	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	502000	USD
CY2011	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	5681000	USD
CY2010	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	1568000	USD
CY2012Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	432000	USD
CY2011Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	363000	USD
CY2012Q4	prim	Costs Incurred On Uncompleted Contracts CostsIncurredOnUncompletedContracts	3882968000	USD
CY2011Q4	prim	Costs Incurred On Uncompleted Contracts CostsIncurredOnUncompletedContracts	2977535000	USD
CY2012Q4	us-gaap	Provision For Loss On Contracts ProvisionForLossOnContracts	764000	USD
CY2011Q4	us-gaap	Provision For Loss On Contracts ProvisionForLossOnContracts	917000	USD
CY2012Q4	prim	Gross Profit Recognized On Uncompleted Contracts GrossProfitRecognizedOnUncompletedContracts	448928000	USD
CY2011Q4	prim	Gross Profit Recognized On Uncompleted Contracts GrossProfitRecognizedOnUncompletedContracts	303634000	USD
CY2012Q4	prim	Costs And Estimated Earnings On Uncompleted Contracts CostsAndEstimatedEarningsOnUncompletedContracts	4332660000	USD
CY2011Q4	prim	Costs And Estimated Earnings On Uncompleted Contracts CostsAndEstimatedEarningsOnUncompletedContracts	3282086000	USD
CY2012Q4	prim	Billings To Date On Uncompleted Contracts BillingsToDateOnUncompletedContracts	4449851000	USD
CY2011Q4	prim	Billings To Date On Uncompleted Contracts BillingsToDateOnUncompletedContracts	3377949000	USD
CY2012Q4	prim	Net Costs And Estimated Earnings In Excess Of Billings NetCostsAndEstimatedEarningsInExcessOfBillings	-117191000	USD
CY2011Q4	prim	Net Costs And Estimated Earnings In Excess Of Billings NetCostsAndEstimatedEarningsInExcessOfBillings	-95863000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	289829000	USD
CY2011Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	213240000	USD
CY2012Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	104989000	USD
CY2011Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	83591000	USD
CY2011Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	32021000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	7020000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	6986000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	5834000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	5330000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	5318000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	21490000	USD
CY2012Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	13401000	USD
CY2011Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	7066000	USD
CY2011Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation Current LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent	733000	USD
CY2012Q4	us-gaap	Retention Payable Due One Year Or Less RetentionPayableDueOneYearOrLess	15946000	USD
CY2011Q4	us-gaap	Retention Payable Due One Year Or Less RetentionPayableDueOneYearOrLess	13980000	USD
CY2012Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	33086000	USD
CY2011Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	29110000	USD
CY2012Q4	us-gaap	Accrued Insurance Current AccruedInsuranceCurrent	22982000	USD
CY2011Q4	us-gaap	Accrued Insurance Current AccruedInsuranceCurrent	18732000	USD
CY2012Q4	prim	Accrued Overhead Cost Current AccruedOverheadCostCurrent	2007000	USD
CY2012Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	3779000	USD
CY2011Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	1546000	USD
CY2011Q4	prim	Accrued Overhead Cost Current AccruedOverheadCostCurrent	1819000	USD
CY2012Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation Current LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent	133000	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Due Current CapitalLeasesFutureMinimumPaymentsDueCurrent	3921000	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Due In Two Years CapitalLeasesFutureMinimumPaymentsDueInTwoYears	2736000	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Due In Three Years CapitalLeasesFutureMinimumPaymentsDueInThreeYears	1141000	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Due In Four Years CapitalLeasesFutureMinimumPaymentsDueInFourYears	105000	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Due CapitalLeasesFutureMinimumPaymentsDue	7903000	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Interest Included In Payments CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments	339000	USD
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Present Value Of Net Minimum Payments CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments	7564000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	11532000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	9605000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	7309000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	4658000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	2661000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	5252000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	41017000	USD
CY2012	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	10684000	USD
CY2011	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	9530000	USD
CY2010	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	9856000	USD
CY2011	us-gaap	Related Party Transaction Expenses From Transactions With Related Party RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty	1278000	USD
CY2010	us-gaap	Related Party Transaction Expenses From Transactions With Related Party RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty	1151000	USD
CY2012	us-gaap	Related Party Transaction Expenses From Transactions With Related Party RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty	1342000	USD
CY2012	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	3	item
CY2012	prim	Revenue Percentage RevenuePercentage	1.000	pure
CY2011	prim	Revenue Percentage RevenuePercentage	1.000	pure
CY2010	prim	Revenue Percentage RevenuePercentage	1.000	pure
CY2012	prim	Gross Profit As Percentage Of Segment Revenue GrossProfitAsPercentageOfSegmentRevenue	0.125	pure
CY2011	prim	Gross Profit As Percentage Of Segment Revenue GrossProfitAsPercentageOfSegmentRevenue	0.127	pure
CY2010	prim	Gross Profit As Percentage Of Segment Revenue GrossProfitAsPercentageOfSegmentRevenue	0.130	pure
CY2012	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Foreign EffectiveIncomeTaxRateReconciliationTaxCreditsForeign	0.0001	pure
CY2011	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Foreign EffectiveIncomeTaxRateReconciliationTaxCreditsForeign	0.0052	pure
CY2010	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Foreign EffectiveIncomeTaxRateReconciliationTaxCreditsForeign	0.0188	pure
CY2012	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.0001	pure
CY2011	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.0052	pure
CY2010	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.0188	pure
CY2012	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	27524000	USD
CY2011	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	24791000	USD
CY2010	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	18491000	USD
CY2012	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	7125000	USD
CY2011	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	5697000	USD
CY2010	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	4663000	USD
CY2012	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	67000	USD
CY2011	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	621000	USD
CY2010	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	1081000	USD
CY2012	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	34716000	USD
CY2011	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	31109000	USD
CY2010	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	24235000	USD
CY2012	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-451000	USD
CY2011	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	6488000	USD
CY2010	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-1951000	USD
CY2012	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-366000	USD
CY2011	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	849000	USD
CY2010	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-189000	USD
CY2012	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-62000	USD
CY2011	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-122000	USD
CY2010	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-36000	USD
CY2012	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-879000	USD
CY2011	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	7215000	USD
CY2010	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-2176000	USD
CY2011	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-150000	USD
CY2012	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.3500	pure
CY2011	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.3500	pure
CY2010	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.3500	pure
CY2012	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.0487	pure
CY2011	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.0433	pure
CY2010	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.0452	pure
CY2012	us-gaap	Effective Income Tax Rate Reconciliation Deductions Qualified Production Activities EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities	0.0297	pure
CY2011	us-gaap	Effective Income Tax Rate Reconciliation Deductions Qualified Production Activities EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities	0.0279	pure
CY2010	us-gaap	Effective Income Tax Rate Reconciliation Deductions Qualified Production Activities EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities	0.0330	pure
CY2012	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.0045	pure
CY2011	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.0292	pure
CY2010	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.0340	pure
CY2012	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.3735	pure
CY2011	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.3946	pure
CY2010	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.3962	pure
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	4973000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	4023000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Unearned Premiums Reserve DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve	1114000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Unearned Premiums Reserve DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve	2657000	USD
CY2012Q4	us-gaap	Deferred Tax Assets State Taxes DeferredTaxAssetsStateTaxes	1537000	USD
CY2011Q4	us-gaap	Deferred Tax Assets State Taxes DeferredTaxAssetsStateTaxes	1605000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Capital Loss Carryforwards DeferredTaxAssetsCapitalLossCarryforwards	344000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Capital Loss Carryforwards DeferredTaxAssetsCapitalLossCarryforwards	344000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Foreign DeferredTaxAssetsTaxCreditCarryforwardsForeign	662000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Foreign DeferredTaxAssetsTaxCreditCarryforwardsForeign	644000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	344000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	344000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	18720000	USD
CY2012Q3	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	431842000	USD
CY2012Q4	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	480883000	USD
CY2011Q1	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	359645000	USD
CY2011Q2	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	351956000	USD
CY2011Q3	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	375483000	USD
CY2011Q4	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	373066000	USD
CY2012Q1	us-gaap	Gross Profit GrossProfit	37596000	USD
CY2012Q2	us-gaap	Gross Profit GrossProfit	44004000	USD
CY2012Q3	us-gaap	Gross Profit GrossProfit	56291000	USD
CY2012Q4	us-gaap	Gross Profit GrossProfit	54819000	USD
CY2011Q1	us-gaap	Gross Profit GrossProfit	40630000	USD
CY2011Q2	us-gaap	Gross Profit GrossProfit	41406000	USD
CY2011Q3	us-gaap	Gross Profit GrossProfit	52121000	USD
CY2011Q4	us-gaap	Gross Profit GrossProfit	51046000	USD
CY2012Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	10486000	USD
CY2012Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	11733000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	15533000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	26661000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	24659000	USD
CY2012Q4	prim	Deferred Tax Liabilities Prepaid Expenses And Other DeferredTaxLiabilitiesPrepaidExpensesAndOther	1600000	USD
CY2011Q4	prim	Deferred Tax Liabilities Prepaid Expenses And Other DeferredTaxLiabilitiesPrepaidExpensesAndOther	1294000	USD
CY2012Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	28261000	USD
CY2011Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	25953000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	-9541000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	-10420000	USD
CY2012	prim	Income Tax Period Of Statute Of Limitations Of State And Foreign Jurisdictions Minimum IncomeTaxPeriodOfStatuteOfLimitationsOfStateAndForeignJurisdictionsMinimum	P3Y
CY2012	prim	Income Tax Period Of Statute Of Limitations Of State And Foreign Jurisdictions Maximum IncomeTaxPeriodOfStatuteOfLimitationsOfStateAndForeignJurisdictionsMaximum	P5Y
CY2011	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	51000	shares
CY2010	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	908000	shares
CY2011	us-gaap	Incremental Common Shares Attributable To Contingently Issuable Shares IncrementalCommonSharesAttributableToContingentlyIssuableShares	386000	shares
CY2010	us-gaap	Incremental Common Shares Attributable To Contingently Issuable Shares IncrementalCommonSharesAttributableToContingentlyIssuableShares	989000	shares
CY2012	prim	Incremental Common Shares Attributable To Shares Issued To Independent Directors Under Share Based Payment Arrangements IncrementalCommonSharesAttributableToSharesIssuedToIndependentDirectorsUnderShareBasedPaymentArrangements	11000	shares
CY2011	prim	Incremental Common Shares Attributable To Shares Issued To Independent Directors Under Share Based Payment Arrangements IncrementalCommonSharesAttributableToSharesIssuedToIndependentDirectorsUnderShareBasedPaymentArrangements	9000	shares
CY2010	us-gaap	Incremental Common Shares Attributable To Conversion Of Preferred Stock IncrementalCommonSharesAttributableToConversionOfPreferredStock	2287000	shares
CY2009	us-gaap	Business Acquisition Equity Interests Issued Or Issuable Number Of Shares Issued BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued	81852.78	shares
CY2012Q1	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	291573000	USD
CY2012Q2	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	337436000	USD
CY2012Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	17516000	USD
CY2012Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	17021000	USD
CY2011Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	12278000	USD
CY2011Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	14462000	USD
CY2011Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	19348000	USD
CY2011Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	12471000	USD
CY2012Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.21
CY2012Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.23
CY2012Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.34
CY2012Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.33
CY2011Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.25
CY2011Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.28
CY2011Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.38
CY2011Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.24
CY2012Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.20
CY2012Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.33
CY2011Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.24
CY2011Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.28
CY2011Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.38
CY2011Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.24
CY2012Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	51096000	shares
CY2012Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.23
CY2012Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.34
CY2012Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	51435000	shares
CY2012Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	51398000	shares
CY2012Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	51404000	shares
CY2011Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	49675000	shares
CY2011Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	51044000	shares
CY2011Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	51054000	shares
CY2011Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	51059000	shares
CY2012Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	51337000	shares
CY2012Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	51435000	shares
CY2012Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	51404000	shares
CY2012Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	51418000	shares
CY2011Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	51051000	shares
CY2011Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	51154000	shares
CY2011Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	51054000	shares
CY2011Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	51292000	shares
CY2012	prim	Common Stock Number Of Holders CommonStockNumberOfHolders	302	item
CY2012Q1	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	1240000	USD
CY2012Q1	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	111790	shares
CY2011Q1	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	647000	USD
CY2011Q1	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	94966	shares
CY2012Q2	prim	Stock Repurchased During Period Average Share Price StockRepurchasedDuringPeriodAverageSharePrice	11.17
CY2012Q2	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	89600	shares
CY2012Q2	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	1000000	USD
CY2012Q3	us-gaap	Stock Issued During Period Shares Share Based Compensation StockIssuedDuringPeriodSharesShareBasedCompensation	15280	shares
CY2012Q1	us-gaap	Stock Issued During Period Shares Share Based Compensation StockIssuedDuringPeriodSharesShareBasedCompensation	12395	shares
CY2011Q3	us-gaap	Stock Issued During Period Shares Share Based Compensation StockIssuedDuringPeriodSharesShareBasedCompensation	14825	shares
CY2012	us-gaap	Use Of Estimates UseOfEstimates	<div style='font-size:10.0pt;FONT-FAMILY: Times New Roman;'> <p style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><b><i><font style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-STYLE: italic; FONT-FAMILY: Times New Roman" size="2">Use of estimates</font></i></b><b><font style="FONT-WEIGHT: bold; FONT-SIZE: 10pt" size="2">—</font></b><font style="FONT-SIZE: 10pt" size="2">The preparation of the Company’s Consolidated Financial Statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities as of the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results could materially differ from those estimates. Significant estimates are made for costs to complete construction projects which have a direct effect on gross profit as reported in these consolidated financial statements.</font></p> <p style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2"> </font></p></div>
CY2012	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style='font-size:10.0pt;FONT-FAMILY: Times New Roman;'> <p style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><b><i><font style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-STYLE: italic; FONT-FAMILY: Times New Roman" size="2">Customer concentration</font></i></b> <font style="FONT-SIZE: 10pt" size="2">— The Company operates in multiple industry segments encompassing the construction of commercial, industrial and public works infrastructure assets throughout primarily the United States. Typically, the top ten customers in any one calendar year generate revenues in excess of 50% of total revenues; however in most years a different group make up the top ten customers.</font></p> <p style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2"> </font></p> <p style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2">For the years ended December 31, 2012 and 2011, revenues generated by the top ten customers were $862.3 million and $1,000 million, respectively, which represented 55.9% and 68.5%, respectively, of total revenues during the periods.</font></p> <p style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2"> </font></p> <p style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2">During the years ending December 31, 2012 and 2011, the Louisiana DOT represented 11.1% and 16.4%, respectively, of total revenues and a large gas and electric utility represented 14.6% and 11.3%, respectively, of total revenues. During the year ending December 31, 2012 and 2011, revenues generated by Rockford under the Ruby contract were $12.6 million and $274.9 million, respectively, which represented 0.8% and 18.8%, respectively, of total revenues during the periods.  The Ruby contract was part of a large project for the construction of a natural gas pipeline from Wyoming to Oregon for which field work was substantially completed in 2011.</font></p> <p style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2"> </font></p> <p style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2">At December 31, 2012, approximately 10.0% of the Company’s accounts receivable were due from one customer, and that customer provided 14.6% of the Company’s revenues during 2012.  At December 31, 2011, approximately 15.5% of the Company’s accounts receivable were due from one customer, and that customer provided 11.3% of the Company’s revenues during 2011.</font></p> <p style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2"> </font></p></div>
CY2011Q4	prim	Assets Foreign AssetsForeign	9385000	USD
CY2012Q4	prim	Assets Foreign AssetsForeign	10335000	USD
CY2012Q4	us-gaap	Us Government Securities At Carrying Value USGovernmentSecuritiesAtCarryingValue	4600000	USD
CY2011Q4	us-gaap	Multiemployer Plans Withdrawal Obligation MultiemployerPlansWithdrawalObligation	5000000	USD
	us-gaap	Proceeds From Warrant Exercises ProceedsFromWarrantExercises	21690000	USD
CY2012	prim	Business Acquisition Pro Forma Percentage Of Tax Rate Used In Calculating Taxes On Income From Continuing Operations BusinessAcquisitionProFormaPercentageOfTaxRateUsedInCalculatingTaxesOnIncomeFromContinuingOperations	0.39	pure
CY2012	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	1673001	USD
CY2012	prim	Business Acquisitions Pro Forma Income Loss From Continuing Operations Before Tax BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeTax	95254	USD
CY2012	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	58678	USD
CY2012	prim	Business Acquisition Pro Forma Weighted Average Number Of Shares Outstanding Basic BusinessAcquisitionProFormaWeightedAverageNumberOfSharesOutstandingBasic	51403	shares
CY2012	prim	Business Acquisition Pro Forma Weighted Average Number Of Diluted Shares Outstanding BusinessAcquisitionProFormaWeightedAverageNumberOfDilutedSharesOutstanding	51418	shares
CY2012	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	1.14
CY2012	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	1.14
CY2011	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	1674406	USD
CY2011	prim	Business Acquisitions Pro Forma Income Loss From Continuing Operations Before Tax BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeTax	90799	USD
CY2011	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	54940	USD
CY2011	prim	Business Acquisition Pro Forma Weighted Average Number Of Shares Outstanding Basic BusinessAcquisitionProFormaWeightedAverageNumberOfSharesOutstandingBasic	50769	shares
CY2011	prim	Business Acquisition Pro Forma Weighted Average Number Of Diluted Shares Outstanding BusinessAcquisitionProFormaWeightedAverageNumberOfDilutedSharesOutstanding	51215	shares
CY2011	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	1.08
CY2011	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	1.07
CY2012Q4	us-gaap	Long Term Debt LongTermDebt	147813000	USD
CY2011Q4	us-gaap	Long Term Debt LongTermDebt	69722000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	19446000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	20002000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	18605000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	25116000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	15286000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	49358000	USD
CY2006Q4	us-gaap	Class Of Warrant Or Right Number Of Securities Called By Warrants Or Rights ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights	1	shares
CY2006Q4	us-gaap	Class Of Warrant Or Right Exercise Price Of Warrants Or Rights ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights	5.00
CY2009Q4	us-gaap	Class Of Warrant Or Right Outstanding ClassOfWarrantOrRightOutstanding	4617499	shares
CY2010Q3	prim	Class Of Warrant Or Right Repurchased ClassOfWarrantOrRightRepurchased	245846	shares
CY2010Q4	prim	Class Of Warrant Or Right Expired ClassOfWarrantOrRightExpired	33744	shares
CY2006Q4	prim	Unit Purchase Options Purchased By Underwriter UnitPurchaseOptionsPurchasedByUnderwriter	450000	shares
CY2006Q4	prim	Number Of Shares Of Common Stock In Each Unit Purchase Option NumberOfSharesOfCommonStockInEachUnitPurchaseOption	1	shares
CY2006Q4	prim	Number Of Warrants In Each Unit Purchase Option NumberOfWarrantsInEachUnitPurchaseOption	1	shares
CY2011Q4	prim	Unit Purchase Options Exercise Price For Cashless Conversion Of Each Share Of Common Stock UnitPurchaseOptionsExercisePriceForCashlessConversionOfEachShareOfCommonStock	8.80
CY2011Q2	prim	Unit Purchase Options Exercised UnitPurchaseOptionsExercised	450000	shares
CY2011Q2	prim	Unit Purchase Options Previous Days Closing Price Used To Calculate Number Of Shares Issuable On Exercise Of Unit UnitPurchaseOptionsPreviousDaysClosingPriceUsedToCalculateNumberOfSharesIssuableOnExerciseOfUnit	13.31
CY2011Q2	prim	Unit Purchase Options Number Of Shares Of Common Stock Issuable On Exercise At Previous Days Closing Price UnitPurchaseOptionsNumberOfSharesOfCommonStockIssuableOnExerciseAtPreviousDaysClosingPrice	152480	shares
CY2011Q2	us-gaap	Payments For Repurchase Of Other Equity PaymentsForRepurchaseOfOtherEquity	2000000	USD
CY2012	prim	Multiemployer Plans Contributions Significant Plans MultiemployerPlansContributionsSignificantPlans	22154000	USD
CY2011	prim	Multiemployer Plans Contributions Significant Plans MultiemployerPlansContributionsSignificantPlans	16911000	USD
CY2010	prim	Multiemployer Plans Contributions Significant Plans MultiemployerPlansContributionsSignificantPlans	7959000	USD
CY2012	prim	Multiemployer Plans Contributions Other Plans MultiemployerPlansContributionsOtherPlans	7949000	USD
CY2011	prim	Multiemployer Plans Contributions Other Plans MultiemployerPlansContributionsOtherPlans	7271000	USD
CY2010	prim	Multiemployer Plans Contributions Other Plans MultiemployerPlansContributionsOtherPlans	4631000	USD
CY2012	us-gaap	Multiemployer Plans Plan Contributions MultiemployerPlansPlanContributions	30103000	USD
CY2011	us-gaap	Multiemployer Plans Plan Contributions MultiemployerPlansPlanContributions	24182000	USD
CY2012Q4	us-gaap	Business Acquisition Equity Interest Issued Or Issuable Value Assigned BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned	-980000	USD
CY2012	prim	Term Of Certificates Of Deposit Maximum TermOfCertificatesOfDepositMaximum	P6M
CY2012Q4	us-gaap	Cash Fdic Insured Amount CashFDICInsuredAmount	153000000	USD
CY2012Q4	us-gaap	Business Acquisition Purchase Price Allocation Assets Acquired BusinessAcquisitionPurchasePriceAllocationAssetsAcquired	136146000	USD
CY2012	prim	Collective Bargaining Agreements Number CollectiveBargainingAgreementsNumber	72	item
CY2012	prim	Collective Bargaining Agreements Requiring Renegotiation CollectiveBargainingAgreementsRequiringRenegotiation	19	item
CY2012Q4	us-gaap	Self Insurance Reserve Current SelfInsuranceReserveCurrent	16547000	USD
CY2011Q4	us-gaap	Self Insurance Reserve Current SelfInsuranceReserveCurrent	13809000	USD
CY2012	prim	Stock Issued Share Based Compensation Restriction Period For Trade StockIssuedShareBasedCompensationRestrictionPeriodForTrade	P1Y
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther	10434000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther	6604000	USD
CY2010Q2	us-gaap	Conversion Of Stock Shares Issued1 ConversionOfStockSharesIssued1	8185278	shares
CY2010Q2	us-gaap	Conversion Of Stock Shares Converted1 ConversionOfStockSharesConverted1	81852.78	shares
CY2012Q4	us-gaap	Capital Leases Balance Sheet Assets By Major Class Net CapitalLeasesBalanceSheetAssetsByMajorClassNet	10382000	USD
CY2011Q4	us-gaap	Capital Leases Balance Sheet Assets By Major Class Net CapitalLeasesBalanceSheetAssetsByMajorClassNet	12304000	USD
CY2010	us-gaap	Proceeds From Warrant Exercises ProceedsFromWarrantExercises	21690000	USD
CY2010	us-gaap	Payments For Repurchase Of Warrants PaymentsForRepurchaseOfWarrants	277000	USD
CY2010	us-gaap	Multiemployer Plans Plan Contributions MultiemployerPlansPlanContributions	12590000	USD
CY2012	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	1511000	USD
CY2012Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	1000000	shares
CY2012	prim	Multiemployer Plans Annual Contributions Number Of Pension Plans MultiemployerPlansAnnualContributionsNumberOfPensionPlans	66	item
CY2010Q4	us-gaap	Business Acquisition Cost Of Acquired Entity Cash Paid BusinessAcquisitionCostOfAcquiredEntityCashPaid	39120000	USD
	prim	Stock Issued During Period Shares Warrants Exercised StockIssuedDuringPeriodSharesWarrantsExercised	4337909	shares
CY2010Q4	us-gaap	Business Acquisition Purchase Price Allocation Assets Acquired BusinessAcquisitionPurchasePriceAllocationAssetsAcquired	141570000	USD
CY2012	prim	Minimum Liquidation Period Of Assets In Which Significant Working Capital Invested MinimumLiquidationPeriodOfAssetsInWhichSignificantWorkingCapitalInvested	P1Y
CY2012	prim	Incremental Common Shares Attributable To Shares Issued On Acquisition IncrementalCommonSharesAttributableToSharesIssuedOnAcquisition	4000	shares
CY2012	us-gaap	Nature Of Operations NatureOfOperations	<div style='font-size:10.0pt;FONT-FAMILY: Times New Roman;'> <p style="MARGIN: 0in 0in 0pt"><b><font style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2">Note 1—Nature of Business</font></b></p> <p style="MARGIN: 0in 0in 0pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2"> </font></p> <p style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><b><i><font style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-STYLE: italic; FONT-FAMILY: Times New Roman" size="2">Organization and operations</font></i></b> <font style="FONT-SIZE: 10pt" size="2"><b>—</b>Primoris Services Corporation is a holding company of various subsidiaries, which collectively are engaged in various construction and product engineering activities. The Company’s underground and directional drilling operations install, replace and repair natural gas, petroleum, telecommunications and water pipeline systems, including large diameter pipeline systems. The Company’s industrial, civil and engineering operations build and provide maintenance services to industrial facilities including power plants, petrochemical facilities, and other processing plants; construct multi-level parking structures; and engage in the construction of highways, bridges and other environmental construction activities. The Company is incorporated in the State of Delaware and in 2011 moved its corporate headquarters from Lake Forest, California to 2100 McKinney Avenue, Suite 1500, Dallas, Texas 75201.</font></p> <p style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2"> </font></p> <p style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2">The wholly-owned subsidiaries of Primoris include ARB, Inc. (“ARB”), ARB Structures, Inc.</font><font style="FONT-SIZE: 10pt" size="2">, All Day Electric Company, Inc., OnQuest, Inc., Cardinal Contractors, Inc., Stellaris, LLC, James Construction Group LLC (“JCG”), Rockford Corporation (“Rockford”), Primoris Energy Services Corporation (“PES”) and Q3 Contracting, Inc (“Q3C”).</font></p> <p style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2"> </font></p> <p style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2">Primoris has been acquisitive over the last several years expanding both service capabilities and geographic footprint.  The acquisitions include:</font></p> <p style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2"> </font></p> <p style="MARGIN: 0in 0in 0pt 70.6pt; TEXT-INDENT: -35.3pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Symbol" size="2">·</font><font style="FONT-SIZE: 3pt" size="1">                                       </font> <font style="FONT-SIZE: 10pt" size="2">On December 18, 2009, we acquired JCG.  JCG is one of the largest general contractors based in the Gulf Coast states and is engaged in highway, industrial and environmental construction, primarily in Louisiana, Texas and Florida.</font></p> <p style="MARGIN: 0in 0in 0pt 70pt; TEXT-INDENT: -35pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Symbol" size="2">·</font><font style="FONT-SIZE: 3pt" size="1">                                       </font> <font style="FONT-SIZE: 10pt" size="2">On November 8, 2010, the Company acquired Rockford, which specializes in construction of large diameter natural gas and liquid pipeline projects and related facilities.</font></p> <p style="MARGIN: 0in 0in 0pt 70pt; TEXT-INDENT: -35pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Symbol" size="2">·</font><font style="FONT-SIZE: 3pt" size="1">                                       </font> <font style="FONT-SIZE: 10pt" size="2">During 2012, the Company made four acquisitions:</font></p> <p style="MARGIN: 0in 0in 0pt 70pt; TEXT-INDENT: -35pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2"> </font></p> <p style="MARGIN: 0in 0in 0pt 1.75in; TEXT-INDENT: -0.25in"><b><font style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2">a.</font></b><b><font style="FONT-WEIGHT: bold; FONT-SIZE: 3pt" size="1">             </font></b> <font style="FONT-SIZE: 10pt" size="2">On March 12, 2012, the Company’s subsidiary, PES, purchased the assets of Sprint Pipeline Services, L.P. (“Sprint”) headquartered in Pearland (outside Houston), Texas.  Sprint provides a comprehensive range of pipeline construction, maintenance, upgrade, fabrication and specialty services primarily in the southeastern United States.  As part of the purchase, PES has the right to use the name of Sprint for a three year period.</font></p> <p style="MARGIN: 0in 0in 0pt 1.75in; TEXT-INDENT: -0.25in"><b><font style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2">b.</font></b><b><font style="FONT-WEIGHT: bold; FONT-SIZE: 3pt" size="1">             </font></b> <font style="FONT-SIZE: 10pt" size="2">On May 30, 2012, the Company’s subsidiary JCG, purchased certain of the assets of Silva Contracting Company, Inc., Tarmac Materials, LLC and C3 Interest, LLC (collectively “Silva”).  Silva provides transportation infrastructure maintenance, asphalt paving, and material sales in the Gulf Coast region of the United States.</font></p> <p style="MARGIN: 0in 0in 0pt 1.75in; TEXT-INDENT: -0.25in"><b><font style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2">c.</font></b><b><font style="FONT-WEIGHT: bold; FONT-SIZE: 3pt" size="1">              </font></b> <font style="FONT-SIZE: 10pt" size="2">On September 28, 2012, the Company purchased the assets of The Saxon Group (“Saxon”).  Based outside of Atlanta, Georgia, Saxon is a full service industrial construction enterprise with special expertise in the industrial gas processing and power plant sectors.</font></p> <p style="MARGIN: 0in 0in 0pt 1.75in; TEXT-INDENT: -0.25in"><b><font style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2">d.</font></b><b><font style="FONT-WEIGHT: bold; FONT-SIZE: 3pt" size="1">             </font></b> <font style="FONT-SIZE: 10pt" size="2">On November 17, 2012, the Company acquired Q3C Contracting, Inc.  Q3C specializes in small diameter pipeline and gas distribution construction, restorative and other services, primarily in the upper Midwest region of the United States.</font></p> <p style="MARGIN: 0in 0in 0pt 1.75in"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2"> </font></p> <p style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 35pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2">In 2011, the Company entered into a joint venture agreement and formed Blythe Power Constructors for the installation of a parabolic trough solar field and steam generation system in California.</font></p> <p style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 35pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2"> </font></p> <p style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2">The Company’s common stock trades on the NASDAQ Select Global Market under the symbol “PRIM”.  In February 2008, Primoris Corporation (referred to as “Former Primoris”), a privately-held company, entered into an Agreement and Plan of Merger with Rhapsody Acquisition Corp. (“Rhapsody”), a publicly-held company.  Rhapsody was founded as a special purpose acquisition company in 2006, to affect a business combination with an operating business. In July 2008, the merger was completed and Rhapsody changed its name to “Primoris Services Corporation”.</font></p> <p style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2"> </font></p> <p style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2">Unless specifically noted otherwise, as used throughout these consolidated financial statements, “Primoris”, “the Company”, “we”, “our”, “us” or “its” refers to the business, operations and financial results of the Company and its wholly-owned subsidiaries.   Reclassifications have been made to prior year financial statement presentation to conform to the current year presentation.</font></p> <p style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2"> </font></p> <p style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><b><i><font style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-STYLE: italic; FONT-FAMILY: Times New Roman" size="2">Seasonality</font></i></b><b><font style="FONT-WEIGHT: bold; FONT-SIZE: 10pt" size="2">—</font></b><font style="FONT-SIZE: 10pt" size="2">Primoris’ results of operations are subject to quarterly variations. Some of the variation is the result of weather, particularly rain and snow, which can impact Primoris’ ability to perform construction services. While the majority of the Company’s work is in the southern half of the United States, these seasonal impacts affect revenues and profitability since gas and other utilities defer routine replacement and repair during their period of peak demand.  In addition, demand for new projects tends to be lower during the early part of the year due to clients’ internal budget cycles.  As a result, the Company usually experiences higher revenues and earnings in the third and fourth quarters of the year as compared to the first two quarters.</font></p> <p style="MARGIN: 0in 0in 0pt; TEXT-ALIGN: center" align="center"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2"> </font></p> <p style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2">The Company is also dependent on large construction projects which tend not to be seasonal, but can fluctuate from year to year based on general economic conditions.  Because of the cyclical nature of its business, the financial results for any period may fluctuate from prior periods, and the Company’s financial condition and operating results may vary from quarter-to-quarter.  Results from one quarter may not be indicative of its financial condition or operating results for any other quarter or for an entire year.</font></p> <p style="MARGIN: 0in 0in 0pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2"> </font></p></div>
CY2012	prim	Payments For Acquisitions PaymentsForAcquisitions	86207000	USD
CY2012	prim	Term Of Certificates Of Deposit Minimum TermOfCertificatesOfDepositMinimum	P4M
CY2012Q4	us-gaap	Business Combination Liabilities Arising From Contingencies Amount Recognized BusinessCombinationLiabilitiesArisingFromContingenciesAmountRecognized	-15598000	USD
CY2012Q4	us-gaap	Business Acquisition Purchase Price Allocation Liabilities Assumed BusinessAcquisitionPurchasePriceAllocationLiabilitiesAssumed	-32756000	USD
CY2012Q4	us-gaap	Business Acquisition Cost Of Acquired Entity Cash Paid BusinessAcquisitionCostOfAcquiredEntityCashPaid	86207000	USD
CY2010Q4	us-gaap	Business Acquisition Purchase Price Allocation Notes Payable And Long Term Debt BusinessAcquisitionPurchasePriceAllocationNotesPayableAndLongTermDebt	-16712000	USD
CY2010Q4	us-gaap	Business Acquisition Purchase Price Allocation Liabilities Assumed BusinessAcquisitionPurchasePriceAllocationLiabilitiesAssumed	-77489000	USD
CY2012	us-gaap	Profit Loss ProfitLoss	58267000	USD
CY2011	us-gaap	Profit Loss ProfitLoss	58559000	USD
CY2010	us-gaap	Profit Loss ProfitLoss	33616000	USD
CY2012Q1	us-gaap	Profit Loss ProfitLoss	10530000	USD
CY2012Q2	us-gaap	Profit Loss ProfitLoss	11857000	USD
CY2012Q3	us-gaap	Profit Loss ProfitLoss	17948000	USD
CY2012Q4	us-gaap	Profit Loss ProfitLoss	17932000	USD
CY2012Q4	us-gaap	Minority Interest MinorityInterest	1511000	USD
CY2012Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	332638000	USD
CY2011Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	274932000	USD
CY2009Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	143959000	USD
CY2010Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	208231000	USD
CY2012	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	980000	USD
CY2012	prim	Common Stock Issued During Period Value Acquisition Two CommonStockIssuedDuringPeriodValueAcquisitionTwo	3450000	USD
CY2012	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	1001000	USD
CY2012	prim	Business Acquisition Number Of Acquisitions BusinessAcquisitionNumberOfAcquisitions	4	item
CY2012	prim	Number Of Variable Interest Entities Whose Financial Results Are Consolidated NumberOfVariableInterestEntitiesWhoseFinancialResultsAreConsolidated	1	item
CY2011	prim	Significant Revision In Contract Estimate Increase Decrease In Per Diluted Share SignificantRevisionInContractEstimateIncreaseDecreaseInPerDilutedShare	0.10
CY2010	prim	Significant Revision In Contract Estimate Increase Decrease In Per Diluted Share SignificantRevisionInContractEstimateIncreaseDecreaseInPerDilutedShare	0.12
CY2009	prim	Significant Revision In Contract Estimate Increase Decrease In Per Diluted Share SignificantRevisionInContractEstimateIncreaseDecreaseInPerDilutedShare	0.13
CY2012Q4	prim	Multiemployer Plans Selling Gneral And Administration Expense MultiemployerPlansSellingGneralAndAdministrationExpense	2500000	USD
CY2012	us-gaap	Effective Income Tax Rate Reconciliation Minority Interest Income Expense EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense	0.0061	pure
CY2012	prim	Effective Income Tax Rate Continuing Operations After Minority Interest EffectiveIncomeTaxRateContinuingOperationsAfterMinorityInterest	0.3674	pure
CY2011	prim	Effective Income Tax Rate Continuing Operations After Minority Interest EffectiveIncomeTaxRateContinuingOperationsAfterMinorityInterest	0.3946	pure
CY2010	prim	Effective Income Tax Rate Continuing Operations After Minority Interest EffectiveIncomeTaxRateContinuingOperationsAfterMinorityInterest	0.3962	pure
CY2011	prim	Common Stock Issued During Period Value Acquisition Two CommonStockIssuedDuringPeriodValueAcquisitionTwo	14800000	USD
CY2011	prim	Stock Issued During Period Value Issued To Employees And Directors StockIssuedDuringPeriodValueIssuedToEmployeesAndDirectors	988000	USD
CY2012Q4	us-gaap	Multiemployer Plans Withdrawal Obligation MultiemployerPlansWithdrawalObligation	7500000	USD
CY2012	prim	Stock Issued During Period Value Issued To Employees And Directors StockIssuedDuringPeriodValueIssuedToEmployeesAndDirectors	2173000	USD
CY2010	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	-874000	USD
CY2012	prim	Percentage Of Labor Force Subject To Collective Bargaining PercentageOfLaborForceSubjectToCollectiveBargaining	0.37	pure
CY2009Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	344000	USD
CY2011Q4	us-gaap	Multiemployer Plans Withdrawal Obligation MultiemployerPlansWithdrawalObligation	7500000	USD
CY2012Q4	prim	Number Of Acquistions NumberOfAcquistions	4	item

Files In Submission

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0001104659-13-018371-index-headers.html	Edgar Link	pending
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prim-20121231.xml	Edgar Link	completed
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$PRIM
Primoris Services Corp Stock $prim

2011 Q4 Form 10-K Financial Statement

#000110465913018371 Filed on March 07, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$PRIM Primoris Services Corp Stock $prim

2011 Q4 Form 10-K Financial Statement

#000110465913018371 Filed on March 07, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$PRIM
Primoris Services Corp Stock $prim