Allowance for Loan Losses (Details Textual) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Allowance for loan losses
Increase in provision for decrease in FDIC indemnification asset	$ 195,000	$ 81,000	$ 1,200,000	$ 1,000,000
Impaired loans	26,482,000		26,482,000		33,557,000
Allowance for Loan Losses Allocated	5,610,000		5,610,000		7,609,000
Allocated amount of specific reserves to customers whose loan terms have been modified in troubled debt restructurings	4,100,000		4,100,000		1,600,000
Loans modified in troubled debt restructurings	1,600,000	5,100,000
Subsequent default, recorded investment			0	15,000
Minimum outstanding balance of non-homogeneous loans to be individually evaluated as to credit risk	100,000		100,000
Covered Loans
Allowance for loan losses
Loans Past Due Over 90 Day Still Accruing	76,000		76,000		630,000
Nonaccrual	2,700,000		2,700,000		4,300,000
Impaired loans	1,700,000		1,700,000		2,900,000
Allowance for Loan Losses Allocated	100,000		100,000		236,000
Non Farm, Non Residential
Allowance for loan losses
Allowance for Loan Losses Allocated	1,361,000		1,361,000		293,000
Loans post modification	$ 1,500,000	$ 4,900,000