XML 63 R67.htm IDEA: XBRL DOCUMENT
v3.20.1

Retirement Benefit Plan - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions |  |  | 3 Months Ended |
--- | --- | --- | --- | ---
Apr. 15, 2019 | Apr. 03, 2019 | Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items] |  |  |  |  |
Shares fully vested, Description |  |  | Shares allocated to a participant’s account are fully vested after three years of credited service, or in the event(s) of reaching age 65, death or disability while an active employee of the Company. |  |
Shares fully vested after credited service |  |  | 3 years |  |
Common stock shares outstanding including ESOP |  |  | 100,669,694 |  | 100,669,694
Company's stock held by ESOP |  |  | 78,398,520 |  | 78,896,806
ESOP dividends declared date |  | Apr. 03, 2019 |  |  |
ESOP dividends declared per share |  | $ 2.00 |  |  |
ESOP dividends declared amount |  | $ 52.1 |  |  |
ESOP dividends payment date |  | May 10, 2019 |  |  |
Common stock dividend ratio | 200.00% |  |  |  |
Dividends declared date | Apr. 15, 2019 |  |  |  |
Dividends record date | May 07, 2019 |  |  |  |
Dividends payment, date | May 08, 2019 |  |  |  |
Direct Costs of Contracts and Indirect, General and Administrative Expense |  |  |  |  |
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items] |  |  |  |  |
ESOP contribution expense |  |  | $ 14.9 | $ 12.2 |

X
- Definition Common stock dividend ratio. + References No definition available. + Details
Name: | psn_CommonStockDividendRatio
Namespace Prefix: | psn_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Common stock shares outstanding including employee stock ownership plan shares. + References No definition available. + Details
Name: | psn_CommonStockSharesOutstandingIncludingEmployeeStockOwnershipPlanShares
Namespace Prefix: | psn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Dividend payable payment date. + References No definition available. + Details
Name: | psn_DividendPayablePaymentDate
Namespace Prefix: | psn_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Employee stock ownership plan ESOP dividend declared date. + References No definition available. + Details
Name: | psn_EmployeeStockOwnershipPlanESOPDividendDeclaredDate
Namespace Prefix: | psn_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Employee stock ownership plan ESOP dividends declared per share. + References No definition available. + Details
Name: | psn_EmployeeStockOwnershipPlanESOPDividendsDeclaredPerShare
Namespace Prefix: | psn_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Employee stock ownership plan ESOP dividends declared to ESOP. + References No definition available. + Details
Name: | psn_EmployeeStockOwnershipPlanESOPDividendsDeclaredToESOP
Namespace Prefix: | psn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Employee stock ownership plan ESOP dividends payment date. + References No definition available. + Details
Name: | psn_EmployeeStockOwnershipPlanESOPDividendsPaymentDate
Namespace Prefix: | psn_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Date the dividend to be paid was declared, in CCYY-MM-DD format. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 + Details
Name: | us-gaap_DividendsPayableDateDeclaredDayMonthAndYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format. + References No definition available. + Details
Name: | us-gaap_DividendsPayableDateOfRecordDayMonthAndYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of plan compensation cost recognized during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109244661&loc=d3e17540-113929 + Details
Name: | us-gaap_EmployeeStockOwnershipPlanESOPCompensationExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_EmployeeStockOwnershipPlanESOPDisclosuresLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Sum of the allocated, committed-to-be-released and suspense shares of the entity held by the plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109244661&loc=d3e17540-113929 + Details
Name: | us-gaap_EmployeeStockOwnershipPlanESOPSharesInESOP
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Description of terms of share-based payment arrangement. Includes, but is not limited to, type of award or grantee and reason for issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDescription
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=psn_DirectCostsOfContractsAndIndirectGeneralAndAdministrativeExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |