XML 22 R50.htm IDEA: XBRL DOCUMENT
v3.2.0.727

Stock-Based Compensation (Details) - Equity Plan - Restricted Stock Units $ in Thousands |  |  | 3 Months Ended | 6 Months Ended | 11 Months Ended
--- | --- | --- | --- | --- | ---
Mar. 24, 2014 shares | May. 03, 2013 item shares | Jun. 30, 2015 USD ($) | Jun. 30, 2014 USD ($) | Jun. 30, 2015 USD ($) shares | Jun. 30, 2014 USD ($) | Mar. 24, 2014 shares
Stock-based compensation |  |  |  |  |  |  |
Shares granted |  |  |  |  | 148,512 |  | 148,512
Number of shares of common stock issued for each unit when vested |  | 1 |  |  |  |  |
Compensation expense recognized | $ |  |  | $ 262 | $ 262 | $ 525 | $ 409 |
Unrecognized compensation expense | $ |  |  | $ 1,900 |  | $ 1,900 |  |
Period to recognize unrecognized compensation expense |  |  |  |  | 1 year 9 months 18 days |  |
Accrued dividend equivalent units |  |  |  |  | 307 |  |
Executive One |  |  |  |  |  |  |
Stock-based compensation |  |  |  |  |  |  |
Shares granted |  | 100,000 |  |  |  |  |
Number of equal installments to vest units over the service period | item |  | 4 |  |  |  |  |
Shares vested |  |  |  |  | 50,000 |  |
Executive Two |  |  |  |  |  |  |
Stock-based compensation |  |  |  |  |  |  |
Shares granted | 48,512 |  |  |  |  |  |
Shares vested |  |  |  |  | 0 |  |
Units Vesting percentage on September 23, 2015 |  |  |  |  | 50.00% |  |
Units remaining vesting percentage on March 23, 2017 |  |  |  |  | 50.00% |  |

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
- Definition Represents the number of equal installments of units of equity-based payment instruments, excluding stock (or unit) options that vested during the reporting period. + References No definition available. + Details
Name: | prim_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNumberOfInstallmentOfVestedUnits
Namespace Prefix: | prim_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Remaining percentage of vesting of share-based compensation awards on specific date. + References No definition available. + Details
Name: | prim_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardRemainingVestingRightsPercentageOnSpecificDate
Namespace Prefix: | prim_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of vesting of share-based compensation awards on specific date. + References No definition available. + Details
Name: | prim_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentageOnSpecificDate
Namespace Prefix: | prim_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
Name: | us-gaap_AllocatedShareBasedCompensationExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares. + References No definition available. + Details
Name: | us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation. + References No definition available. + Details
Name: | us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of options vested. + References No definition available. + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares
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: |

X
- Details
Name: | us-gaap_TitleOfIndividualAxis=prim_ExecutiveOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TitleOfIndividualAxis=prim_ExecutiveTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |