Loans and Allowance For Loan Losses (Details Textual) (USD $)	6 Months Ended		12 Months Ended
	Jun. 30, 2012 Contracts Loan	Jun. 30, 2011	Dec. 31, 2011 Loan	Dec. 31, 2010
Loans And Allowance For Loan Losses (Textual) [Abstract]
Bank wide delinquency of loans in percentage	3.13%		3.71%
Management monitors delinquencies	$ 27,158,000		$ 31,315,000
Nonaccrual Loans	34,993,000	34,993,000	34,471,000
Recorded investment	2,972,000			3,099,000
Allocated reserves of nonaccrual TDR loans	455,000		307,000
Number of loans	5		5
Total Past Due	27,158,000		31,315,000
Commitment to lend additional amounts to borrowers	0		0
Time period of repayment based on delinquency period one	30 to 59 days
Time period of repayment based on delinquency period two	60 to 89 days
Time period of repayment based on delinquency period three	Greater than 90 days
Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Credit score	850,000
Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Credit score	$ 300,000
Non Owner [Member] | Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Family residential properties	4
Non Owner [Member] | Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Family residential properties	1
Conventional [Member] | Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Conventional Family residential properties	4
Conventional [Member] | Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Conventional Family residential properties	1