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Derivative Financial Instruments Derivative Financial Instruments (Details 3) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Derivative [Line Items]    
Notional Amount $ 91,913 $ 119,008
March 15, 2013 Interest Rate Swap    
Derivative [Line Items]    
Contract Date Mar. 15, 2013  
Notional Amount $ 54,400  
Fixed Rate 1.02%  
Effective Date Apr. 05, 2013  
Maturity Date Mar. 31, 2019  
March 29, 2013 Interest Rate Swap    
Derivative [Line Items]    
Contract Date Mar. 29, 2013  
Notional Amount $ 54,400  
Fixed Rate 0.97%  
Effective Date Apr. 05, 2013  
Maturity Date Mar. 31, 2019