Fair Value Measurements (Details 2) (USD $) In Thousands, unless otherwise specified						9 Months Ended				9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013 Non-recurring basis Level 3	Dec. 31, 2012 Non-recurring basis Level 3	Sep. 30, 2013 Non-recurring basis Level 3 Appraisal of collateral Impaired loans	Sep. 30, 2013 Non-recurring basis Level 3 Appraisal of collateral Impaired loans Minimum	Sep. 30, 2013 Non-recurring basis Level 3 Appraisal of collateral Impaired loans Maximum	Sep. 30, 2013 Non-recurring basis Level 3 Appraisal of collateral Impaired loans Weighted Average	Sep. 30, 2013 Non-recurring basis Level 3 Appraisal of collateral OREO	Sep. 30, 2013 Non-recurring basis Level 3 Appraisal of collateral OREO Minimum	Sep. 30, 2013 Non-recurring basis Level 3 Appraisal of collateral OREO Maximum	Sep. 30, 2013 Non-recurring basis Level 3 Appraisal of collateral OREO Weighted Average
Quantitative Information about Level 3 Fair Value Measurements
Impaired loans	$ 37,405	$ 55,593	$ 3,963	$ 2,284	$ 3,963
OREO	$ 2,156	$ 3,450	$ 1,192	$ 511					$ 1,192
Appraisal adjustments (as a percent)						(0.80%)	(100.00%)	(34.90%)		(6.10%)	(100.00%)	(48.70%)