Fair Value Measurement (Schedule of Fair Value on a Nonrecurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012		Dec. 31, 2011		Jun. 30, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 10,390	[1]	$ 13,705	[1]
Other real estate owned	3,290	[1]	3,224	[1]
Mortgage servicing rights, Fair Value	312		368		475
Total assets	13,992		17,297
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	10,390	[1],[2]	13,705	[1]
Other real estate owned	3,290	[1]	3,224	[1]
Mortgage servicing rights, Fair Value	312		368
Total assets	$ 13,992		$ 17,297

[1] (1) Includes assets directly charged-down to fair value during the year-to-date period

[2] (1) Includes loans directly charged-down to fair value during the year-to-date period.