XML 12 R39.htm IDEA: XBRL DOCUMENT v3.3.0.814

Fair Value Measurements (Details 2) $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($) item	Sep. 30, 2014 USD ($)
Rollforward of contingent consideration liability level three fair value measurements
Change in fair value of contingent consideration liability	$ (5,271)	$ (4,358)
Contingent Consideration Liability
Additional information
Number of unobservable inputs | item	2
Minimum probability of acquired entity meeting contractual operating performance target (as a percent)	33.00%
Maximum probability of acquired entity meeting contractual operating performance target (as a percent)	100.00%
Contingent Consideration Liability | Significant Unobservable Inputs (Level 3)
Rollforward of contingent consideration liability level three fair value measurements
Balance at the beginning of the period	$ 6,922	9,233
Change in fair value of contingent consideration liability	125	642
Reduction due to non-attainment of performance target - Ram-Fab & Vadnais	(596)
Balance at the end of the period	1,451	6,946
Contingent Consideration Liability | Significant Unobservable Inputs (Level 3) | Q3 Contracting
Rollforward of contingent consideration liability level three fair value measurements
Payment to Q3C sellers for meeting performance targets	$ (5,000)	(5,000)
Contingent Consideration Liability | Significant Unobservable Inputs (Level 3) | Vadnais Corporation
Rollforward of contingent consideration liability level three fair value measurements
Additions to contingent consideration liability		729
Contingent Consideration Liability | Significant Unobservable Inputs (Level 3) | Surber, Ram-Fab and Williams
Rollforward of contingent consideration liability level three fair value measurements
Additions to contingent consideration liability		$ 1,342

X

- Definition

Represents the maximum probability of the acquired entity meeting the contractual operating performance target expressed as a percentage.

+ References

No definition available.

+ Details

Name:	prim_FairValueInputsMaximumProbabilityOfAcquiredCompanyMeetingContractualOperatingPerformanceTarget
Namespace Prefix:	prim_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the minimum probability of acquired entity meeting the contractual operating performance target expressed as a percentage.

+ References

No definition available.

+ Details

Name:	prim_FairValueInputsMinimumProbabilityOfAcquiredCompanyMeetingContractualOperatingPerformanceTarget
Namespace Prefix:	prim_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the number of unobservable inputs.

+ References

No definition available.

+ Details

Name:	prim_NumberOfUnobservableInputs
Namespace Prefix:	prim_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 805



-SubTopic 30



-Section 50



-Paragraph 4



-Subparagraph (a)(1)



-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7008-128479

+ Details

Name:	us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_FairValueInputsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

Name:	us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of purchases of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 820



-SubTopic 10



-Section 50



-Paragraph 2



-Subparagraph (c)(2)



-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

+ Details

Name:	us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of sales of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 820



-SubTopic 10



-Section 50



-Paragraph 2



-Subparagraph (c)(2)



-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

+ Details

Name:	us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySales
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 820



-SubTopic 10



-Section 50



-Paragraph 2



-Subparagraph (c)



-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

+ Details

Name:	us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Glossary Investing Activities



-URI http://asc.fasb.org/extlink&oid=6516133



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 230



-SubTopic 10



-Section 45



-Paragraph 13



-Subparagraph (b)



-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3213-108585

+ Details

Name:	us-gaap_PaymentsToAcquireBusinessesGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_FairValueByLiabilityClassAxis=prim_ContingentConsiderationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=prim_Q3ContractingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=prim_VadnaisCorporationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=prim_SurberRamfabAndWilliamsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: