XML 40 R50.htm IDEA: XBRL DOCUMENT v2.4.1.9
Goodwill And Intangible Assets Goodwill and Indefinite-Lived Intangible Assets (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Indefinite-lived Intangible Assets [Line Items]      
Goodwill $ 530,670us-gaap_Goodwill $ 239,181us-gaap_Goodwill $ 234,195us-gaap_Goodwill
Indefinite-Lived Intangible Assets (Including Goodwill) 583,670aan_IndefiniteLivedIntangibleAssetsIncludingGoodwill 239,181aan_IndefiniteLivedIntangibleAssetsIncludingGoodwill  
Trade Names and Trademarks      
Indefinite-lived Intangible Assets [Line Items]      
Trade Names and Trademarks $ 53,000us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TrademarksAndTradeNamesMember		 $ 0us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TrademarksAndTradeNamesMember