Summary of Property, Plant and Equipment (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Internal-use software development cost	$ 22.6	$ 15.6
Internal-use software development cost, accumulated amortization	$ 6.6	$ 9.8

The carrying amount of capitalized internal-use computer software costs net of accumulated amortization as of the balance sheet date.

No definition available.

Name:	aan_CapitalizedInternalUseComputerSoftwareNet
Namespace Prefix:	aan_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant