Loans and Allowance for Loan Losses (Details 13) (USD $)				3 Months Ended	9 Months Ended		3 Months Ended	9 Months Ended				3 Months Ended	9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Sep. 30, 2012 Non-acquired loans loan	Sep. 30, 2013 Non-acquired loans loan	Sep. 30, 2012 Non-acquired loans loan	Sep. 30, 2012 Non-acquired loans Interest rate modification loan	Sep. 30, 2013 Non-acquired loans Interest rate modification loan	Sep. 30, 2012 Non-acquired loans Interest rate modification loan	Sep. 30, 2012 Non-acquired loans Interest rate modification Construction and land development loan	Sep. 30, 2013 Non-acquired loans Interest rate modification Commercial non-owner occupied loan	Sep. 30, 2012 Non-acquired loans Interest rate modification Commercial owner occupied loan	Sep. 30, 2013 Non-acquired loans Interest rate modification Commercial owner occupied loan	Sep. 30, 2012 Non-acquired loans Interest rate modification Commercial owner occupied loan	Sep. 30, 2013 Non-acquired loans Interest rate modification Consumer owner occupied loan	Sep. 30, 2013 Non-acquired loans Term modification loan	Sep. 30, 2012 Non-acquired loans Term modification loan	Sep. 30, 2012 Non-acquired loans Term modification Construction and land development loan	Sep. 30, 2013 Non-acquired loans Term modification Commercial and industrial loan
Loans and Allowance for Loan Losses
Number of loans				5	4	5	4	3	4	1	1	3	1	3	1	1	1	1	1
Pre-Modification Outstanding Recorded Investment				$ 4,659,000	$ 1,817,000	$ 5,497,000	$ 4,659,000	$ 1,121,000	$ 5,267,000	$ 165,000	$ 247,000	$ 4,659,000	$ 750,000	$ 5,102,000	$ 124,000	$ 696,000	$ 230,000	$ 230,000	$ 696,000
Post-Modification Outstanding Recorded Investment				4,607,000	1,253,000	5,429,000	4,607,000	1,119,000	5,206,000	159,000	247,000	4,607,000	750,000	5,047,000	122,000	134,000	223,000	223,000	134,000
Balance of accruing TDRs	$ 4,200,000	$ 6,300,000	$ 6,300,000