v3.4.0.3

Segment Information - Schedule of Provisions for Contractual Discounts and Estimated Uncompensated Care as a Percentage of Gross Segment Billings (Detail) - Air Medical [Member]	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Provisions For Contractual Discounts And Estimated Uncompensated Care [Line Items]
Gross Air Medical segment billings	100.00%	100.00%
Provision for contractual discounts	71.00%	74.00%
Provision for uncompensated care	3.00%	0.00%

X

- Definition

Percentage of gross billings.

+ References

No definition available.

+ Details

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

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 estimated uncompensated care.

+ References

No definition available.

+ Details

Name:	phii_PercentageOfProvisionForEstimatedUncompensatedCare
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: