Organization (Details)	6 Months Ended	12 Months Ended
Jun. 24, 2012	Dec. 25, 2011
Organization (Textual) [Abstract]
Minimum percentage of ownership by domestic citizens subsidiary in shipping business	75.00%	75.00%

Minimum percentage of ownership by domestic citizens subsidiary shipping business.

No definition available.

Name:	hrz_MinimumPercentageOfOwnershipByDomesticCitizensSubsidiaryShippingBusiness
Namespace Prefix:	hrz_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration