Fair Value of Financial Instruments (Details 4) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012
Fair Value Disclosures
Impaired loans	$ 2,606	$ 2,736	$ 5,193
Other real estate owned	1,186	2,258	9,339
Non-recurring basis | Fair Value Measurement Using: Level 3
Fair Value Disclosures
Impaired loans	2,606		5,193
Other real estate owned	1,186		9,339
Total assets	3,792		14,532
Non-recurring basis | Assets at Fair Value
Fair Value Disclosures
Impaired loans	2,606		5,193
Other real estate owned	1,186		9,339
Total assets	$ 3,792		$ 14,532