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Derivative Activities (Narratives) (Details) - USD ($)
$ in Millions
Sep. 30, 2015
Dec. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]    
Notional Amount Purchased Option $ 3.4 $ 10.7
Embedded Derivative, Fair Value of Embedded Derivative Liability 1.0 5.5
Notional Amount Embedded Option 3.2 $ 10.5
Interest Rate Cap [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative, Notional Amount $ 109.9