Fair Value Measurements (Details 2) (USD $) In Thousands, unless otherwise specified						6 Months Ended			6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013 Non-recurring basis Level 3	Dec. 31, 2012 Non-recurring basis Level 3	Jun. 30, 2013 Non-recurring basis Level 3 Appraisal of collateral Impaired loans	Jun. 30, 2013 Non-recurring basis Level 3 Appraisal of collateral Impaired loans Minimum	Jun. 30, 2013 Non-recurring basis Level 3 Appraisal of collateral Impaired loans Maximum	Jun. 30, 2013 Non-recurring basis Level 3 Appraisal of collateral OREO	Jun. 30, 2013 Non-recurring basis Level 3 Appraisal of collateral OREO Minimum	Jun. 30, 2013 Non-recurring basis Level 3 Appraisal of collateral OREO Maximum
Quantitative Information about Level 3 Fair Value Measurements
Impaired loans	$ 45,081	$ 55,593	$ 4,735	$ 2,284	$ 4,735
OREO	$ 2,617	$ 3,450	$ 57	$ 511				$ 57
Appraisal adjustments (as a percent)						(2.20%)	(100.00%)		(61.10%)	(100.00%)