Derivative Financial Instruments (Details 2) - Non-hedging derivative financial instruments - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Derivative Financial Instruments
Gain (loss)	$ 271	$ (54)	$ 250	$ 698
Interest rate swap contracts | Other expense
Derivative Financial Instruments
Gain (loss)	36	(67)	(100)	(45)
Interest rate swap contracts | Other income
Derivative Financial Instruments
Gain (loss)	150	427	464	724
Loan commitments | Mortgage banking income
Derivative Financial Instruments
Gain (loss)	(105)	(57)	16	30
Forward contracts - mortgage loan | Mortgage banking income
Derivative Financial Instruments
Gain (loss)	$ 190	$ (357)	$ (130)	$ (11)