No definition available.

Name:	pke_NumberOfInsuranceCarriers
Namespace Prefix:	pke_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Number of insurance carriers that have asserted counter claims to the lawsuit.

No definition available.

Name:	pke_NumberOfInsuranceCarriersThatHaveAssertedCounterClaimsToLawsuit
Namespace Prefix:	pke_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Number of insurance carriers that have filed answers to the lawsuit.

No definition available.

Name:	pke_NumberOfInsuranceCarriersThatHaveFiledAnswersToLawsuit
Namespace Prefix:	pke_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Number of sites of the company or subsidiaries that have been named for potential environmental remediation liability.

No definition available.

Name:	pke_NumberOfSitesOfCompanyOrSubsidiariesThatHaveBeenNamedForPotentialEnvironmentalRemediationLiability
Namespace Prefix:	pke_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Number of units covered under general liability insurance coverage.

No definition available.

Name:	pke_NumberOfUnitsCoveredUnderGeneralLiabilityInsuranceCoverage
Namespace Prefix:	pke_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Percentage of legal defense and remediation costs associated with sites reimbursed by insurance carriers.

No definition available.

Name:	pke_PercentageOfLegalDefenseAndRemediationCostsAssociatedWithSitesReimbursedByInsuranceCarriers
Namespace Prefix:	pke_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Carrying amount as of the balance sheet date of reserves for the costs of settling insured claims and costs incurred in the claims settlement process attributable to asbestos and environmental claims, net of estimated reinsurance recoveries.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 40

-Section 50

-Paragraph 3

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6482485&loc=d3e14764-158437

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

Amount of litigation expense, including but not limited to legal, forensic, accounting, and investigative fees.

No definition available.