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Investments (Textuals) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Related Party Transaction [Line Items]      
Interest Rate Derivative Assets, at Fair Value $ 8.4    
Investments (Textuals)      
Realized gain (losses) from sale of securities 0.0 $ 0.0  
Proceeds from sale of investments 0.0 0.0 $ 39.6
Cash surrender value of insurance contracts $ 77.8 $ 75.9  
Aisino-Wincor Retail And Banking Systems (Shanghai) Co.,Ltd [Member]      
Related Party Transaction [Line Items]      
Equity Method Investment, Ownership Percentage 43.60%    
Inspur (Suzhou) Financial Technology Service Co Ltd [Member]      
Related Party Transaction [Line Items]      
Equity Method Investment, Ownership Percentage 40.00%