Derivative Financial Instruments (Notional Amounts) (Details 1) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Interest Rate Lock Commitments
Derivative [Line Items]
Notional Amount	$ 42,643	$ 35,422
Fair Value	937	789
Forward Commitments
Derivative [Line Items]
Notional Amount	56,181	45,143
Fair Value	(138)	(56)
Receive Fixed / Pay Variable Swap
Derivative [Line Items]
Notional Amount	378,442	374,670
Fair Value	(8,932)	(1,331)
Pay Fixed / Receive Variable Swap
Derivative [Line Items]
Notional Amount	378,442	374,670
Fair Value	8,542	1,436
Foreign Exchange Contracts
Derivative [Line Items]
Notional Amount	57,877	54,332
Fair Value	$ 13	$ (13)