Investment Securities (Details 2) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Fair Value
Less than 12 Months	$ 51,410,000	$ 54,521,000
12 months or Longer	7,860,000	26,831,000
Total	59,270,000	81,352,000
Unrealized Losses
Less than 12 Months	(153,000)	(695,000)
12 months or Longer	(535,000)	(885,000)
Total	(688,000)	(1,580,000)
Investment securities pledged as collateral	216,340,000	250,360,000
U.S. Treasury and Federal agencies securities
Fair Value
Less than 12 Months	37,316,000	42,536,000
Total	37,316,000	42,536,000
Unrealized Losses
Less than 12 Months	(83,000)	(50,000)
Total	(83,000)	(50,000)
U.S. States and political subdivisions securities
Fair Value
Less than 12 Months	7,730,000	423,000
12 months or Longer	3,364,000	5,149,000
Total	11,094,000	5,572,000
Unrealized Losses
Less than 12 Months	(46,000)	(9,000)
12 months or Longer	(436,000)	(651,000)
Total	(482,000)	(660,000)
Mortgage-backed securities - Federal agencies
Fair Value
Less than 12 Months	6,264,000	5,071,000
12 months or Longer	60,000	13,099,000
Total	6,324,000	18,170,000
Unrealized Losses
Less than 12 Months	(24,000)	(1,000)
12 months or Longer	(1,000)	(8,000)
Total	(25,000)	(9,000)
Corporate debt securities
Fair Value
Less than 12 Months		4,858,000
12 months or Longer	4,431,000	8,579,000
Total	4,431,000	13,437,000
Unrealized Losses
Less than 12 Months		(142,000)
12 months or Longer	(94,000)	(222,000)
Total	(94,000)	(364,000)
Foreign government and other securities
Fair Value
Less than 12 Months	100,000	1,011,000
Total	100,000	1,011,000
Unrealized Losses
Less than 12 Months		(1,000)
Total		(1,000)
Total debt securities
Fair Value
Less than 12 Months	51,410,000	53,899,000
12 months or Longer	7,855,000	26,827,000
Total	59,265,000	80,726,000
Unrealized Losses
Less than 12 Months	(153,000)	(203,000)
12 months or Longer	(531,000)	(881,000)
Total	(684,000)	(1,084,000)
Marketable equity securities
Fair Value
Less than 12 Months		622,000
12 months or Longer	5,000	4,000
Total	5,000	626,000
Unrealized Losses
Less than 12 Months		(492,000)
12 months or Longer	(4,000)	(4,000)
Total	$ (4,000)	$ (496,000)