Loans (Non-Accrual Loan, Segregated by Class of Loans) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	$ 18,647	$ 23,410	$ 24,575
Commercial [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	2,571	2,450
Commercial [Member] | Construction and Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	4,960	5,989
Commercial [Member] | Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	1,452	1,315
Residential Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	7,520	10,791
Consumer Loans [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	1,338	1,656
Consumer Loans [Member] | Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	68	96
Consumer Loans [Member] | Auto [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	25	37
Consumer Loans [Member] | Boat/RV [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	$ 713	$ 1,076