v3.3.1.900

Summary of Significant Accounting Policies - Provisions for Contractual Discounts and Uncompensated Care Applied to Air Medical Trade Receivables Expressed as Percentage of Total Segment Billings (Detail) - Air Medical [Member]	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Provisions For Contractual Discounts And Estimated Uncompensated Care [Line Items]
Allowance for contractual discounts	65.00%	72.00%	60.00%
Trade Accounts Receivable [Member]
Provisions For Contractual Discounts And Estimated Uncompensated Care [Line Items]
Allowance for contractual discounts	56.00%	53.00%
Allowance for uncompensated care	23.00%	23.00%

X

- Definition

Provision for contractual discounts.

+ References

No definition available.

+ Details

Name:	phii_PercentageOfProvisionForContractualDiscounts
Namespace Prefix:	phii_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of provision for uncompensated care.

+ References

No definition available.

+ Details

Name:	phii_PercentageOfProvisionForUncompensatedCare
Namespace Prefix:	phii_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Provisions For Contractual Discounts And Estimated Uncompensated Care [Line Items]

+ References

No definition available.

+ Details

Name:	phii_ProvisionsForContractualDiscountsAndEstimatedUncompensatedCareLineItems
Namespace Prefix:	phii_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=phii_AirMedicalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=us-gaap_TradeAccountsReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: