Loans (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Mar. 31, 2013	Sep. 21, 2012
Loans (Additional Textual) [Abstract]
Amounts charged off	$ 24,268,000	$ 35,739,000
Total Recorded Investment	61,017,000	153,567,000
Loans (Textual) [Abstract]
Home Savings sold assets in a bulk sale transaction, which was comprised primarily of loans				146,100,000	147,300,000
Loans had a recorded investment as of the closing date	117,400,000
Home Savings received proceeds	77,400,000
Total loss on sale of Home Savings loans	30,200,000
Classified loans (figures are book balance prior to the effect of any reserves)	(308,000)	(2,614,000)	(877,000)
Non performing loans (figures are book balance prior to the effect of any reserves)	63,300,000
Non current loans (figures are book balance prior to the effect of any reserves)	7,391,000	5,675,000	4,365,000
Period within which commitments are to be disbursed	60 days
Actual terms of the commitments	2 months
Outstanding standby letters of credit	702,000	1,100,000
Outstanding commitments to fund the Overdraft Privilege	42,300,000	43,100,000
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
Troubled debt restructurings that subsequently defaulted		2,200,000
Effect of troubled debt restructurings on provision for loan losses	0	0
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
Minimum [Member]
Loans (Additional Textual) [Abstract]
Interest rate of fixed rate loan	2.50%
Period of maturity of fixed rate loan	3 months
Maximum [Member]
Loans (Additional Textual) [Abstract]
Extension of the maturity date	6 months
Interest rate of fixed rate loan	18.00%
Period of maturity of fixed rate loan	30 years
Troubled debt restructurings [Member]
Loans (Additional Textual) [Abstract]
Increment in allowance for loan losses	584,000	344,000
Amounts charged off	0	796,000
Restructured loans	25,400,000	50,900,000
Specific reserve	1,000,000	2,000,000
Total Recorded Investment	$ 41,300,000	$ 16,400,000
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