Branch Acquisition and Divestiture (Details) (USD $)	0 Months Ended	12 Months Ended
	Oct. 04, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Oct. 26, 2012 Branch Acquisition [Member] branch
Business Acquisition [Line Items]
Deposits and Borrowings Divested	$ 85,900,000
Number of full-service branches acquired					15
Payments to Acquire Businesses, Gross					12,000,000
Premium received upon sale of branch					3,300,000
Estimated fair values of assets acquired and liabilities assumed:
Cash and cash equivalents					267,689,000
Loans					5,664,000
Premises and equipment					5,177,000
Core deposit intangible					2,856,000
Other assets					45,000
Total assets acquired					281,431,000
Deposits					(287,559,000)
Other liabilities					(54,000)
Total liabilities acquired					(287,613,000)
Goodwill		(44,806,000)	(47,636,000)	(41,730,000)	(6,182,000)
Business acquisition, premium paid					8,700,000
Gross performing commercial loans acquired in business acquisition					6,000,000
Fair value mark recognized on commercial loans acquired in business acquisition					317,000
Gross deposits assumed in business acquisition					286,700,000
Fair value mark recognized on deposits assumed in business acquisition					900,000
Direct costs related to acquisition, expensed as incurred					2,300,000
Loans Divested	46,000,000
Real Estate and Equipment Divested	602,000
Premium on Deposits Sold	3.50%
Gain on Branch Divestiture	2,700,000	2,742,000	0	0
Branch Acquisition and Divestiture Costs	$ 374,000	$ 374,000	$ 2,324,000	$ 0