Income Taxes (Details 2) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Deferred tax assets
Reserve for loan losses	$ 4,737	$ 2,788
Net operating loss carryforwards	825	0	0
Deferred income	320	360
Post-retirement benefits	193	180
Other than temporary impairment on securities	2	7
Gross deferred tax assets	6,077	3,335
Valuation allowance	(5,376)	0	0
Deferred tax assets, net of valuation allowance	701	3,335
Deferred tax liabilities
Depreciation	(108)	(382)
Available-for-sale securities	240	276
Mortgage-servicing rights	(353)	(238)
Total deferred tax liabilities	(701)	(896)
Net deferred tax assets	$ 0	$ 2,439