Investment Securities (Narrative)(Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Schedule of Available-for-sale Securities [Line Items]
Gain on sale of investment securities									$ 737,000	$ 640,000	$ 1,254,000
Income Tax Expense (Benefit)	(54,000)	(28,000)	7,000	(69,000)	9,598,000	509,000	(429,000)	(1,487,000)	(144,000)	8,191,000	(6,074,000)
Securities pledged as collateral	100,800,000				87,300,000				100,800,000	87,300,000
Impairment of the investment portfolio	2,996,000				4,569,000				2,996,000	4,569,000
Total fair value of the investment portfolio	33,257,000				26,623,000				33,257,000	26,623,000
Investment securities available for sale, at fair value	189,259,000				174,323,000				189,259,000	174,323,000
Municipal securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Impairment of the investment portfolio	16,000				323,000				16,000	323,000
Total fair value of the investment portfolio	1,050,000				4,490,000				1,050,000	4,490,000
Number of municipal securities in investment portfolio	25								25
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	5								5
Investment securities available for sale, at fair value	12,101,000				11,034,000				12,101,000	11,034,000
Municipal securities [Member] | California [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	13								13
Investment securities available for sale, at fair value	6,300,000								6,300,000
Corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Impairment of the investment portfolio	185,000				1,281,000				185,000	1,281,000
Total fair value of the investment portfolio	9,811,000				18,714,000				9,811,000	18,714,000
Number of municipal securities in investment portfolio	7								7
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	2								2
Investment securities available for sale, at fair value	32,685,000				25,617,000				32,685,000	25,617,000
Other securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities available for sale, at fair value	134,000				135,000				134,000	135,000
Available-for-sale Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Income Tax Expense (Benefit)									265,000	224,000	439,000
Asset-backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Impairment of the investment portfolio	191,000								191,000
Total fair value of the investment portfolio	9,218,000								9,218,000
Number of municipal securities in investment portfolio	2								2
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	1								1
Investment securities available for sale, at fair value	$ 19,729,000								$ 19,729,000