Derivative Instruments (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Derivatives designated as cash flow hedging instruments:
Gains (losses) on derivatives financial instruments included in the Consolidated Statements of Income
Gains (losses) on derivative financial instruments	$ 0	$ 0	$ 203
Derivatives not designated as hedging instruments:
Gains (losses) on derivatives financial instruments included in the Consolidated Statements of Income
Gains (losses) on derivative financial instruments	(247)	3,523	2,612
Included in interest income on loans | Derivatives designated as cash flow hedging instruments: | Interest rate swap
Gains (losses) on derivatives financial instruments included in the Consolidated Statements of Income
Gains (losses) on derivative financial instruments	0	0	203
Included in interest income on loans | Derivatives not designated as hedging instruments: | Interest rate contracts
Gains (losses) on derivatives financial instruments included in the Consolidated Statements of Income
Gains (losses) on derivative financial instruments	2,200	2,961	3,193
Included in other noninterest expense | Derivatives not designated as hedging instruments: | Interest rate contracts
Gains (losses) on derivatives financial instruments included in the Consolidated Statements of Income
Gains (losses) on derivative financial instruments	0	0	69
Included in mortgage banking income | Derivatives not designated as hedging instruments: | Interest rate lock commitments
Gains (losses) on derivatives financial instruments included in the Consolidated Statements of Income
Gains (losses) on derivative financial instruments	(530)	1,171	(1,159)
Included in mortgage banking income | Derivatives not designated as hedging instruments: | Forward commitments
Gains (losses) on derivatives financial instruments included in the Consolidated Statements of Income
Gains (losses) on derivative financial instruments	$ (1,917)	$ (609)	$ 509