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Derivative Activities (Narratives) (Details) - USD ($)
Mar. 31, 2016
Dec. 31, 2015
Derivative Instruments, Gain (Loss) [Line Items]    
Notional Amount Purchased Option $ 2,200,000 $ 3,400,000
Embedded Derivative, Fair Value of Embedded Derivative Liability 746,000 1,100,000
Notional Amount Embedded Option 2,100,000 3,200,000
Interest Rate Cap [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative, Notional Amount $ 124,600,000 $ 109,800,000