Loans and Asset Quality Information (Details 13) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Information related to loans modified in a troubled debt restructuring:
Number of contracts, TDRs	12	3
TDRs arising during period Pre-Modification	$ 839	$ 2,098
TDRs arising during period Post-Modification	832	2,098
Non-covered
Information related to loans modified in a troubled debt restructuring:
Number of contracts, TDRs	11
TDRs arising during period Pre-Modification	792
TDRs arising during period Post-Modification	792
Non-covered | Commercial Secured
Information related to loans modified in a troubled debt restructuring:
Number of contracts, TDRs Accruing	1
TDRs arising during period - Accruing Pre-Modification	61
TDRs arising during period - Accruing Post-Modification	61
Non-covered | Real estate residential, farmland and mutli-family
Information related to loans modified in a troubled debt restructuring:
Number of contracts, TDRs Accruing	6
TDRs arising during period - Accruing Pre-Modification	508
TDRs arising during period - Accruing Post-Modification	508
Number of contracts, TDRs Nonaccrual	3
TDRs arising during period - Nonaccrual Pre-Modification	209
TDRs arising during period - Nonaccrual Post-Modification	209
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
Covered
Information related to loans modified in a troubled debt restructuring:
Number of contracts, TDRs Accruing	1	3
TDRs arising during period - Accruing Pre-Modification	47	2,098
TDRs arising during period - Accruing Post-Modification	$ 40	$ 2,098