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Significant Accounting Policies and Consolidated Financial Statement Components Loans and Fees Receivable, Net Narrative (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Dec. 31, 2014
Accounting Policies [Abstract]        
Deferred revenue $ 20.3 $ 18.2 $ 16.7 $ 15.7
Weighted Average Remaining Accretion Period of Deferred Revenue 11 months 10 months