Loans (Summary of TDRs with a Payment Default During the Period) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 Loans	Dec. 31, 2011 Loans
Troubled debt restructurings on financing receivables with defaults payment
Financing receivable modifications subsequent default number of loans	14	34
Financing receivable modification subsequent default recorded investment	$ 5,759	$ 6,227
Commercial [Member] | Commercial Loan Portfolio [Member]
Troubled debt restructurings on financing receivables with defaults payment
Financing receivable modifications subsequent default number of loans	3	7
Financing receivable modification subsequent default recorded investment	1,300	2,659
Real estate commercial [Member] | Commercial Loan Portfolio [Member]
Troubled debt restructurings on financing receivables with defaults payment
Financing receivable modifications subsequent default number of loans	5	9
Financing receivable modification subsequent default recorded investment	3,293	1,828
Commercial loan portfolio [Member] | Commercial Loan Portfolio [Member]
Troubled debt restructurings on financing receivables with defaults payment
Financing receivable modifications subsequent default number of loans	8	16
Financing receivable modification subsequent default recorded investment	4,593	4,487
Consumer loan portfolio (real estate residential) [Member] | Consumer Portfolio Segment [Member]
Troubled debt restructurings on financing receivables with defaults payment
Financing receivable modifications subsequent default number of loans	6	18
Financing receivable modification subsequent default recorded investment	$ 1,166	$ 1,740