Office Property and Equipment (Schedule of Office Property And Equipment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Office property and equipment, gross	$ 26,534	$ 27,029
Less accumulated depreciation	(19,728)	(19,361)
Office property and equipment, net	6,806	7,668
Land [Member]
Property, Plant and Equipment [Line Items]
Office property and equipment, gross	840	840
Buildings And Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Office property and equipment, gross	10,982	11,807
Furniture, fixtures and equipment [Member]
Property, Plant and Equipment [Line Items]
Office property and equipment, gross	$ 14,712	$ 14,382
Minimum [Member] | Buildings And Leasehold Improvements [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 And Leasehold Improvements [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