Derivative Instruments - (Details 1) - Not designated as hedging instruments: - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Derivatives, Fair Value [Line Items]
Gains (losses) on derivative financial instruments	$ 5,977	$ (97)	$ 3,546	$ 4,172
Interest rate contracts | Included in interest income on loans
Derivatives, Fair Value [Line Items]
Gains (losses) on derivative financial instruments	660	576	1,786	1,677
Interest rate lock commitments | Included in gains on sales of mortgage loans held for sale
Derivatives, Fair Value [Line Items]
Gains (losses) on derivative financial instruments	2,297	2,326	3,359	3,783
Forward commitments | Included in gains on sales of mortgage loans held for sale
Derivatives, Fair Value [Line Items]
Gains (losses) on derivative financial instruments	$ 3,020	$ (2,999)	$ (1,599)	$ (1,288)