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Derivative Financial Instruments - Notional Amount and Fair Value (Details) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Forward contracts    
Asset Derivatives    
Notional Amount $ 60,750 $ 0
Fair Value 240 0
Liability Derivatives    
Notional Amount 0 55,012
Interest rate lock commitments    
Asset Derivatives    
Notional Amount 36,943 29,967
Fair Value 623 521
Forward contracts | Forward contracts    
Liability Derivatives    
Derivative financial instrument $ 0 $ (405)