Office Property and Equipment (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Office property and equipment, gross	$ 26,024	$ 25,006
Less: Accumulated Depreciation	(17,568)	(17,160)
Office property and equipment, net	8,456	7,846
Depreciation	934	913
Land [Member]
Property, Plant and Equipment [Line Items]
Office property and equipment, gross	840	611
Buildings [Member]
Property, Plant and Equipment [Line Items]
Office property and equipment, gross	11,652	10,882
Furniture, fixtures and equipment [Member]
Property, Plant and Equipment [Line Items]
Office property and equipment, gross	$ 13,532	$ 13,513
Minimum [Member] | Buildings [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	5 years
Minimum [Member] | Furniture, fixtures and equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	2 years
Maximum [Member] | Buildings [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	31 years 6 months
Maximum [Member] | Furniture, fixtures and equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	20 years