Loans and Allowance for Loan Losses - Loans on Nonaccrual Status (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Nonaccrual Loans	$ 20,918	$ 21,986
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Nonaccrual Loans	10,145	11,241
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Nonaccrual Loans	227	289
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Nonaccrual Loans	5,127	5,231
Home equity loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Nonaccrual Loans	4,845	4,464
Indirect
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Nonaccrual Loans	362	443
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Nonaccrual Loans	$ 212	$ 318