Securities (Schedule of Unrealized Loss on Investments) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013 security	Dec. 31, 2012 security
Schedule of Investments [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	26	15
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 14,285	$ 8,109
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	(220)	(71)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	5,075	4,945
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	(443)	(626)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	19,360	13,054
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses, Total	(663)	(697)
Held-to-maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	8	3
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	11,309	838
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	(149)	(2)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	214	279
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	(3)	(11)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value, Total	11,523	1,117
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Losses, Total	(152)	(13)
US Government Agencies Debt Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	2
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	2,005
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	(4)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	2,005
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses, Total	(4)
Held-to-maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	2
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	4,019
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	(31)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value, Total	4,019
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Losses, Total	(31)
US States and Political Subdivisions Debt Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	10
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	6,196
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	(150)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	6,196
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses, Total	(150)
Residential Mortgage Backed Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	3	5
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	1,945	3,272
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	(25)	(43)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	1,773	1,951
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	(63)	(80)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	3,718	5,223
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses, Total	(88)	(123)
Held-to-maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	3	3
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	2,246	838
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	(8)	(2)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	214	279
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	(3)	(11)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value, Total	2,460	1,117
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Losses, Total	(11)	(13)
Commercial Mortgage Backed Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	4	4
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	684	2,351
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	(3)	(2)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	158
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	842	2,351
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses, Total	(3)	(2)
Held-to-maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	2
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	4,070
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	(106)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value, Total	4,070
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Losses, Total	(106)
Corporate Debt Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	7	6
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	3,455	2,486
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	(38)	(26)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	3,144	2,994
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	(380)	(546)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	6,599	5,480
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses, Total	(418)	(572)
Held-to-maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	1
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	974
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	(4)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value, Total	974
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Losses, Total	$ (4)