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Derivative Financial Instruments (Gains (Losses) Recognized on Derivatives (Cash Flow Hedges)) (Details) - Interest Rate Swap - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Interest Expense    
Trading Activity, Gains and Losses, Net [Line Items]    
Effective Portion, Recognized in OCI, Amount of Gain (Loss) $ 1,705 $ 206
Effective Portion, Reclassified from AOCI into Income, Amount of Gain (Loss) (1,914) (2,222)
Other Income    
Trading Activity, Gains and Losses, Net [Line Items]    
Ineffective Portion, Recognized in Income on Derivatives, Amount of Gain (Loss) $ 0 $ 0