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Loans - TDR's by Class and Specific Reserves (Details) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2015 USD ($) loan | Sep. 30, 2014 USD ($) loan | Dec. 31, 2014 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of Loans | loan | 88 | 96 | 94
Balance | $ 24,715 | $ 27,877 | $ 27,214
Specific Reserves | $ 524 | $ 1,311 | $ 868
Commercial real estate |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of Loans | loan | 16 | 20 | 19
Balance | $ 10,696 | $ 12,809 | $ 12,282
Specific Reserves | $ 69 | $ 696 | $ 267
Commercial construction |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of Loans | loan | 1 | 1 | 1
Balance | $ 788 | $ 1,172 | $ 1,172
Specific Reserves | $ 76 | $ 204 | $ 207
Commercial other |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of Loans | loan | 13 | 16 | 15
Balance | $ 1,621 | $ 2,092 | $ 2,007
Specific Reserves | $ 1 | $ 0 | $ 0
Residential term |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of Loans | loan | 53 | 54 | 54
Balance | $ 10,837 | $ 10,978 | $ 10,932
Specific Reserves | $ 378 | $ 390 | $ 373
Home equity line of credit |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of Loans | loan | 5 | 5 | 5
Balance | $ 773 | $ 826 | $ 821
Specific Reserves | $ 0 | $ 21 | $ 21

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