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Investments (Textuals) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Related Party Transaction [Line Items]          
Interest Rate Derivative Assets, at Fair Value $ 6.0   $ 6.0   $ 8.4
Investments (Textuals)          
Cash surrender value of insurance contracts 77.4   77.4   $ 77.8
Realized gains and proceeds from the sale of securities $ 0.0 $ 0.0 $ 0.0 $ 0.0  
Inspur (Suzhou) Financial Technology Service Co Ltd [Member]          
Related Party Transaction [Line Items]          
Equity Method Investment, Ownership Percentage 40.00%   40.00%    
Aisino-Wincor Retail And Banking Systems (Shanghai) Co.,Ltd [Member]          
Related Party Transaction [Line Items]          
Equity Method Investment, Ownership Percentage 43.60%   43.60%