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2. Finance Receivables (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Finance Receivables Details    
Automobile finance receivables, net of unearned interest $ 890,123 $ 795,786
Less: Unearned acquisition fees and discounts (32,693) (31,443)
Finance Receivables $ 857,430 $ 764,343