XML 39 R53.htm IDEA: XBRL DOCUMENT v3.3.0.814

Dividends and Earnings Per Share (Details 2) - Equity Plan - Restricted Stock Units - shares	9 Months Ended	11 Months Ended
	Sep. 30, 2015	Mar. 24, 2014
Earnings per share
Shares granted	148,512	148,512
Accrued Dividend Equivalent Units	535

X

- Definition

Represents the number of units accrued under dividend equivalents.

+ References

No definition available.

+ Details

Name:	prim_AccruedDividendEquivalentUnits
Namespace Prefix:	prim_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	prim_EarningsPerShareLineItems
Namespace Prefix:	prim_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 718



-SubTopic 10



-Section 50



-Paragraph 2



-Subparagraph (c)(2)(iii)(1)



-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_PlanNameAxis=prim_EquityIncentivePlan2013Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_RestrictedStockUnitsRSUMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: