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Document And Entity Information
 12 Months Ended
Dec. 31, 2011
Document and Entity Information [Abstract]  
Entity Registrant Name FIRSTSERVICE CORP
Document Type 40-F
Current Fiscal Year End Date --12-31
Entity Common Stock, Shares Outstanding 29,941,254
Amendment Flag false
Entity Central Index Key 0000913353
Entity Current Reporting Status Yes
Entity Voluntary Filers No
Entity Well-known Seasoned Issuer No
Document Period End Date Dec. 31, 2011
Document Fiscal Year Focus 2011
Document Fiscal Period Focus FY