Summary of Significant Accounting Policies - Additional Information (Detail) (Republic Of Ireland And United Kingdom)	Mar. 31, 2013 Store	Apr. 01, 2012 Store
Republic Of Ireland And United Kingdom
Summary Of Significant Accounting Policies [Line Items]
Excluded licensed locations from systemwide restaurant progression	246	253

Excluded Licensed Location From Franchise Restaurant Progression

No definition available.

Name:	thi_ExcludedLicensedLocationFromFranchiseRestaurantProgression
Namespace Prefix:	thi_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant