Document and Entity Information	6 Months Ended
	Jun. 30, 2013	Jul. 26, 2013 Voting Common Stock [Member]	Jul. 26, 2013 Non-Voting Common Stock [Member]
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q2
Trading Symbol	PHII
Entity Registrant Name	PHI INC
Entity Central Index Key	0000350403
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		2,905,757	12,567,879