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Loans and Allowance for Credit Losses - Troubled Debt Restructurings (Details) (USD $)
 3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Dec. 31, 2013
Financing Receivable, Modifications [Line Items]          
Outstanding Recorded Investment $ 8,734,000   $ 8,734,000   $ 10,366,000
Reserves specific to modified loans 324,000   324,000   946,000
Defaults on troubled debt restructurings 0 0 0 0  
Increase in allowance related to TDR's with subsequent defaults     6,000 427,000  
Loans and Leases Receivable, Impaired, Commitment to Lend 0   0    
Equity loans and lines of credit
          
Financing Receivable, Modifications [Line Items]          
Number of Loans 1   1    
Pre-Modification Outstanding Recorded Investment 7,000 [1]   7,000 [1]    
Principal Modification 0 [2]   0 [2]    
Post Modification Outstanding Recorded Investment 7,000 [3]   7,000 [3]    
Outstanding Recorded Investment $ 6,000   $ 6,000    
[1] Amounts represent the recorded investment in loans before recognizing effects of the TDR, if any.
[2] Principal Modification includes principal forgiveness at the time of modification, contingent principal forgiveness granted over the life of the loan based on borrower performance, and principal that has been legally separated and deferred to the end of the loan, with zero percent contractual interest rate.
[3] Balance outstanding after principal modification, if any borrower reduction to recorded investment.