Fair Value (Details 2) (USD $) In Thousands, unless otherwise specified																	9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2013 Nonrecurring basis Fair Value OREO	Dec. 31, 2012 Nonrecurring basis Fair Value OREO	Sep. 30, 2012 Nonrecurring basis Fair Value OREO	Sep. 30, 2013 Nonrecurring basis Fair Value Non-acquired impaired loans	Dec. 31, 2012 Nonrecurring basis Fair Value Non-acquired impaired loans	Sep. 30, 2012 Nonrecurring basis Fair Value Non-acquired impaired loans	Sep. 30, 2013 Nonrecurring basis Significant Unobservable Inputs (Level 3) OREO	Dec. 31, 2012 Nonrecurring basis Significant Unobservable Inputs (Level 3) OREO	Sep. 30, 2012 Nonrecurring basis Significant Unobservable Inputs (Level 3) OREO	Sep. 30, 2013 Nonrecurring basis Significant Unobservable Inputs (Level 3) Non-acquired impaired loans	Dec. 31, 2012 Nonrecurring basis Significant Unobservable Inputs (Level 3) Non-acquired impaired loans	Sep. 30, 2012 Nonrecurring basis Significant Unobservable Inputs (Level 3) Non-acquired impaired loans	Sep. 30, 2013 Nonrecurring basis Significant Unobservable Inputs (Level 3) Discounted appraisals Impaired loans Minimum	Sep. 30, 2013 Nonrecurring basis Significant Unobservable Inputs (Level 3) Discounted appraisals Impaired loans Maximum	Sep. 30, 2013 Nonrecurring basis Significant Unobservable Inputs (Level 3) Discounted appraisals Impaired loans Weighted average	Sep. 30, 2013 Nonrecurring basis Significant Unobservable Inputs (Level 3) Discounted appraisals OREO Minimum	Sep. 30, 2013 Nonrecurring basis Significant Unobservable Inputs (Level 3) Discounted appraisals OREO Maximum	Sep. 30, 2013 Nonrecurring basis Significant Unobservable Inputs (Level 3) Discounted appraisals OREO Weighted average
Fair Value
Other Real Estate	$ 75,873	$ 66,505	$ 74,547	$ 83,871	$ 75,873	$ 66,505	$ 74,547	$ 9,088	$ 42,356	$ 18,618	$ 75,873	$ 66,505	$ 74,547	$ 9,088	$ 42,356	$ 18,618
Quantitative Information about Level 3 Fair Value Measurements
Collateral discounts (as a percent)																	0.00%	25.00%	4.39%
Collateral discounts and estimated costs to sell (as a percent)																				0.00%	50.00%	28.71%