XML 64 R51.htm IDEA: XBRL DOCUMENT
v3.21.1

Contracts with Customers - Summary of Remaining Unsatisfied Performance Obligations Expect to Satisfy (Details) $ in Thousands | Mar. 31, 2021 USD ($)
--- | ---
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items] |
Remaining unsatisfied performance obligations | $ 5,100,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-04-01 |
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items] |
Remaining unsatisfied performance obligations | $ 2,687,243
Revenue, remaining performance obligation, expected timing of satisfaction, period | 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2022-01-01 |
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items] |
Remaining unsatisfied performance obligations | $ 1,096,580
Revenue, remaining performance obligation, expected timing of satisfaction, period | 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2023-01-01 |
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items] |
Remaining unsatisfied performance obligations | $ 1,356,247
Revenue, remaining performance obligation, expected timing of satisfaction, period |
Federal Solution Segment | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-04-01 |
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items] |
Remaining unsatisfied performance obligations | $ 1,096,552
Revenue, remaining performance obligation, expected timing of satisfaction, period | 1 year
Federal Solution Segment | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2022-01-01 |
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items] |
Remaining unsatisfied performance obligations | $ 493,388
Revenue, remaining performance obligation, expected timing of satisfaction, period | 1 year
Federal Solution Segment | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2023-01-01 |
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items] |
Remaining unsatisfied performance obligations | $ 376,121
Revenue, remaining performance obligation, expected timing of satisfaction, period |
Critical Infrastructure | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-04-01 |
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items] |
Remaining unsatisfied performance obligations | $ 1,590,691
Revenue, remaining performance obligation, expected timing of satisfaction, period | 1 year
Critical Infrastructure | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2022-01-01 |
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items] |
Remaining unsatisfied performance obligations | $ 603,192
Revenue, remaining performance obligation, expected timing of satisfaction, period | 1 year
Critical Infrastructure | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2023-01-01 |
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items] |
Remaining unsatisfied performance obligations | $ 980,126
Revenue, remaining performance obligation, expected timing of satisfaction, period |

X
- Definition Amount of transaction price allocated to performance obligation that has not been recognized as revenue. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130556-203045 + Details
Name: | us-gaap_RevenueRemainingPerformanceObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period in which remaining performance obligation is expected to be recognized as revenue, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130556-203045 + Details
Name: | us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis=2021-04-01
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis=2022-01-01
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis=2023-01-01
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=psn_FederalSolutionSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=psn_CriticalInfrastructureSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |