Derivative Financial Instruments (Details 2) - Non-hedging derivative financial instruments - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Derivative Financial Instruments
Gain (loss)	$ 1,237	$ 179	$ 779
Interest rate swap contracts | Other expense
Derivative Financial Instruments
Gain (loss)	(8)	16	124
Interest rate swap contracts | Other income
Derivative Financial Instruments
Gain (loss)	1,045	357	716
Loan commitments | Mortgage banking income
Derivative Financial Instruments
Gain (loss)	45	(10)	(208)
Forward contracts - mortgage loan | Mortgage banking income
Derivative Financial Instruments
Gain (loss)	155	(263)	154
Forward contracts - foreign exchange | Other income
Derivative Financial Instruments
Gain (loss)	$ 0	$ 79	$ (7)