Acquired Loans Part 4 (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Mar. 16, 2012	Dec. 31, 2011	Apr. 15, 2011
Allowance for loan loss [Abstract]
Balance, beginning	$ 502,000
Loans charged-off	(371,000)
Recoveries	416,000
Net charge-offs	45,000
Provision for loan losses, acquired loans	5,528,000
Balance, ending	6,075,000
Revolving credit agreements acquired		5,900,000
Total loans acquired subject to loss share agreement with the FDIC				97,800,000
Total percentage of loans acquired subject to loss-share agreement with the FDI (in hundredths)				91.00%
Nonaccrual loans not accounted for under FASB ASC Topic 310-30	1,100,000		491,000
Covered Loans [Member]
Allowance for loan loss [Abstract]
Balance, beginning	502,000
Loans charged-off	(81,000)
Recoveries	157,000
Net charge-offs	76,000
Provision for loan losses, acquired loans	3,612,000
Balance, ending	4,190,000
Noncovered Loans [Member]
Allowance for loan loss [Abstract]
Balance, beginning	0
Loans charged-off	(290,000)
Recoveries	259,000
Net charge-offs	(31,000)
Provision for loan losses, acquired loans	1,916,000
Balance, ending	$ 1,885,000