Loans and Asset Quality Information (Details 13) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Information related to loans modified in a troubled debt restructuring:
Number of contracts, TDRs	7	6	19	9
TDRs arising during period Pre-Modification	$ 989	$ 6,269	$ 1,828	$ 8,367
TDRs arising during period Post-Modification	990	6,269	1,822	8,367
Non-covered
Information related to loans modified in a troubled debt restructuring:
Number of contracts, TDRs	4	3	15	3
TDRs arising during period Pre-Modification	677	841	1,469	841
TDRs arising during period Post-Modification	679	841	1,471	841
Non-covered | Real estate residential, farmland and mutli-family
Information related to loans modified in a troubled debt restructuring:
Number of contracts, TDRs Accruing	3	1	9	1
TDRs arising during period - Accruing Pre-Modification	574	303	1,082	303
TDRs arising during period - Accruing Post-Modification	576	303	1,084	303
Number of contracts, TDRs Nonaccrual			3
TDRs arising during period - Nonaccrual Pre-Modification			209
TDRs arising during period - Nonaccrual Post-Modification			209
Non-covered | Real estate commercial
Information related to loans modified in a troubled debt restructuring:
Number of contracts, TDRs Accruing	1		2
TDRs arising during period - Accruing Pre-Modification	103		164
TDRs arising during period - Accruing Post-Modification	103		164
Non-covered | Consumer
Information related to loans modified in a troubled debt restructuring:
Number of contracts, TDRs Accruing			1
TDRs arising during period - Accruing Pre-Modification			14
TDRs arising during period - Accruing Post-Modification			14
Non-covered | Real Estate construction, land development and other land loans
Information related to loans modified in a troubled debt restructuring:
Number of contracts, TDRs Accruing		1		1
TDRs arising during period - Accruing Pre-Modification		300		300
TDRs arising during period - Accruing Post-Modification		300		300
Number of contracts, TDRs Nonaccrual		1		1
TDRs arising during period - Nonaccrual Pre-Modification		238		238
TDRs arising during period - Nonaccrual Post-Modification		238		238
Covered
Information related to loans modified in a troubled debt restructuring:
Number of contracts, TDRs Accruing	3	3	4	6
TDRs arising during period - Accruing Pre-Modification	312	5,428	359	7,526
TDRs arising during period - Accruing Post-Modification	$ 311	$ 5,428	$ 351	$ 7,526