Loans (Details 9) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2012 Loans	Sep. 30, 2012 Loans
Commercial Loan Portfolio [Member]
Troubled debt restructurings on financing receivables with defaults payment
Financing receivable modifications subsequent default number of contract	6	13
Financing receivable modification subsequent default recorded investment	$ 4,439	$ 5,719
Commercial [Member] | Commercial Loan Portfolio [Member]
Troubled debt restructurings on financing receivables with defaults payment
Financing receivable modifications subsequent default number of contract	2	3
Financing receivable modification subsequent default recorded investment	1,240	1,300
Real estate commercial [Member] | Commercial Loan Portfolio [Member]
Troubled debt restructurings on financing receivables with defaults payment
Financing receivable modifications subsequent default number of contract	3	5
Financing receivable modification subsequent default recorded investment	2,457	3,293
Subtotal-commercial loan portfolio [Member] | Commercial Loan Portfolio [Member]
Troubled debt restructurings on financing receivables with defaults payment
Financing receivable modifications subsequent default number of contract	5	8
Financing receivable modification subsequent default recorded investment	3,697	4,593
Consumer loan portfolio (real estate residential) [Member]
Troubled debt restructurings on financing receivables with defaults payment
Financing receivable modifications subsequent default number of contract	1	5
Financing receivable modification subsequent default recorded investment	$ 742	$ 1,126