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Other Assets - Schedule of Other Assets (Footnote) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Other Assets [Abstract]    
Escrow deposit for payment of representation, warranty and indemnification claims $ 52,900  
Pledge Advance Remittance Period 2 years  
Prepaid expenses $ 34,900 $ 41,300
Allowance for automotive dealer financing notes 4,400 $ 30
Provision for loan losses on automotive dealer financing notes $ 4,300  
Period for deferred tax effects being amortized to income tax expense 7 years