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Loans Receivable and Allowance for Loan Losses (Changes in the Accretable Yield for Purchased Credit Impaired Loans) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Loans Receivable and Allowance for Loan Losses [Abstract]    
Balance at beginning of period $ 76 $ 171
Accretion (23) (24)
Balance at end of period $ 53 $ 147