Background (Details)	Mar. 31, 2013
Background Disclosure [Abstract]
Parent Interest in Reporting Entity	100.00%
Percentage Held in Parent by Ultimate Parent	100.00%

The ultimate parent entity's interest in the net assets of the entity's parent, expressed as a percentage.

No definition available.

Name:	hzc_OwnershipPercentageHeldInParentByUltimateParent
Namespace Prefix:	hzc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant