Derivative Financial Instruments (Details 2) - Non-hedging derivative financial instruments - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Derivative Financial Instruments
Gain (loss)	$ (35)	$ 582	$ (21)	$ 752
Interest rate swap contracts | Other expense
Derivative Financial Instruments
Gain (loss)	(43)	41	(136)	22
Interest rate swap contracts | Other income
Derivative Financial Instruments
Gain (loss)	110	221	314	297
Loan commitments | Mortgage banking income
Derivative Financial Instruments
Gain (loss)	73	(52)	121	87
Forward contracts - mortgage loan | Mortgage banking income
Derivative Financial Instruments
Gain (loss)	$ (175)	$ 372	$ (320)	$ 346