Loans (Analysis of Loan Servicing Rights) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Loan Servicing Rights [Roll Forward]
Beginning balance	$ 937		$ 913		$ 969
Loan servicing rights capitalized	569		248		153
Amortization	(231)	[1]	(224)	[1]	(209)	[1]
Ending balance	1,275		937		913
Valuation Allowance [Roll Forward]
Beginning balance	(172)		(156)		(167)
Decrease (increase) in impairment reserve	7	[2]	(16)	[2]	11	[2]
Ending balance	(165)		(172)		(156)
Total Loan Servicing Rights [Roll Forward]
Beginning Balance	765		757		802
Loan servicing rights capitalized	569		248		153
Amortization	(231)	[1]	(224)	[1]	(209)	[1]
Decrase (increase) in impairment reserve	7	[2]	(16)	[2]	11	[2]
Ending balance	$ 1,110		$ 765		$ 757

[1] Amortization expense is charged against loan servicing fee income.

[2] (Increases) decreases in the impairment reserve are recorded as (reductions) additions to loan servicing fee income.