Derivative Instruments (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
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	$ 203	$ 503	$ 610
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	2,612	(899)	1,448
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	203	503	610
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	3,193	2,345	994
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	69	(69)	0
Included in gains on sales of mortgage loans held for sale | 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	(1,159)	375	881
Included in gains on sales of mortgage loans held for sale | 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	$ 509	$ (3,550)	$ (427)