Loans (Details Textual) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Loans (Additional Textual) [Abstract]
Amounts charged off	$ (10,280,000)	$ (9,030,000)	$ (19,064,000)	$ (16,256,000)
Total Recorded Investment					153,567,000
Loans (Textual) [Abstract]
Period within which commitments are to be disbursed			60 days
Reduction in stated interest rate of loan, minimum outstanding period			6 months
Reduction in stated interest rate of loan, maximum outstanding period			28 years
Maximum period after which troubled debt restructuring is considered to be in payment by default			30 days
Period of cumulative homogeneous loans past due included in company analysis			90 days
Maximum duration under which loans may be housed under Special Mention category			No Longer Than 12 Months
Troubled debt restructurings [Member]
Loans (Additional Textual) [Abstract]
Restructured loans	32,800,000		32,800,000		50,900,000
Specific reserve	1,000,000		1,000,000		2,000,000
Increment in allowance for loan losses	78,000		0
Amounts charged off	29,000		505,000
Total Recorded Investment	$ 7,900,000		$ 7,900,000
Troubled debt restructurings [Member] | Minimum [Member]
Loans (Additional Textual) [Abstract]
Extension of the maturity date			6 months
Troubled debt restructurings [Member] | Maximum [Member]
Loans (Additional Textual) [Abstract]
Extension of the maturity date			3 years