Premises and Equipment (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Premises and equipment
Cost	$ 14,066,000		$ 13,828,000
Accumulated Depreciation	(12,079,000)		(11,786,000)
Net Book Value	1,987,000		2,042,000
Depreciation and amortization	293,000	287,000
Minimum
Premises and equipment
Lease term	3 years
Estimated useful life	3 years
Maximum
Premises and equipment
Lease term	15 years
Estimated useful life	5 years
Leasehold improvements
Premises and equipment
Cost	5,975,000		5,885,000
Accumulated Depreciation	(4,927,000)		(4,776,000)
Net Book Value	1,048,000		1,109,000
Furniture and fixtures
Premises and equipment
Cost	1,109,000		1,078,000
Accumulated Depreciation	(1,033,000)		(1,028,000)
Net Book Value	76,000		50,000
Capitalized software
Premises and equipment
Cost	4,033,000		4,011,000
Accumulated Depreciation	(3,590,000)		(3,512,000)
Net Book Value	443,000		499,000
Equipment
Premises and equipment
Cost	2,949,000		2,854,000
Accumulated Depreciation	(2,529,000)		(2,470,000)
Net Book Value	$ 420,000		$ 384,000