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Derivative Activities (Narratives) (Details) - USD ($)
Dec. 31, 2015
Dec. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]    
Notional Amount Purchased Option $ 3,400,000 $ 10,700,000
Embedded Derivative, Fair Value of Embedded Derivative Liability 1,100,000 5,500,000
Notional Amount Embedded Option 3,200,000 10,500,000
Interest Rate Cap [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative, Notional Amount $ 109,800,000  
Contract Termination Member | Interest Rate Cap [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative, Notional Amount   $ 110,000,000