Premises and Equipment (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Premises and equipment consisted of [Abstract]
Premises and equipment, gross	$ 55,504	$ 52,045
Less accumulated depreciation and amortization	22,976	21,781
Premises and equipment, net	32,528	30,264
Depreciation expense	1,884	1,816
Minimum rental commitment due under noncancellable leases [Abstract]
2013	193
2014	172
2015	101
2016	10
2017	5
Total	481
Rental expense of premises and equipment	294	286
Land [Member]
Premises and equipment consisted of [Abstract]
Premises and equipment, gross	7,804	7,804
Buildings [Member]
Premises and equipment consisted of [Abstract]
Premises and equipment, gross	25,262	25,208
Construction in Progress [Member]
Premises and equipment consisted of [Abstract]
Premises and equipment, gross	4,306	1,228
Leasehold improvements [Member]
Premises and equipment consisted of [Abstract]
Premises and equipment, gross	866	858
Furniture, fixtures and equipment [Member]
Premises and equipment consisted of [Abstract]
Premises and equipment, gross	$ 17,266	$ 16,947