Derivative Instruments - (Details 1) - Not designated as hedging instruments: - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Derivatives, Fair Value [Line Items]
Gains (losses) on derivative financial instruments	$ (904)	$ 1,582	$ (2,431)	$ 4,269
Included in interest income on loans | Interest rate contracts
Derivatives, Fair Value [Line Items]
Gains (losses) on derivative financial instruments	593	544	1,126	1,101
Included in gains on sales of mortgage loans held for sale | Interest rate lock commitments
Derivatives, Fair Value [Line Items]
Gains (losses) on derivative financial instruments	(566)	(1,248)	1,062	1,457
Included in gains on sales of mortgage loans held for sale | Forward commitments
Derivatives, Fair Value [Line Items]
Gains (losses) on derivative financial instruments	$ (931)	$ 2,286	$ (4,619)	$ 1,711