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Loans - TDR's by Class and Specific Reserves (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2016 USD ($) loan | Mar. 31, 2015 USD ($) loan | Dec. 31, 2015 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of Loans | loan | 82 | 90 | 84
Balance | $ 23,628 | $ 26,524 | $ 23,923
Specific Reserves | $ 436 | $ 695 | $ 455
Commercial real estate |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of Loans | loan | 14 | 17 | 15
Balance | $ 10,133 | $ 11,831 | $ 10,350
Specific Reserves | $ 65 | $ 133 | $ 85
Commercial construction |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of Loans | loan | 1 | 1 | 1
Balance | $ 788 | $ 1,172 | $ 788
Specific Reserves | $ 96 | $ 189 | $ 94
Commercial other |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of Loans | loan | 10 | 13 | 11
Balance | $ 1,116 | $ 1,789 | $ 1,168
Specific Reserves | $ 0 | $ 0 | $ 1
Municipal |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of Loans | loan | 0 | 0 | 0
Balance | $ 0 | $ 0 | $ 0
Specific Reserves | $ 0 | $ 0 | $ 0
Residential term |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of Loans | loan | 53 | 54 | 53
Balance | $ 10,856 | $ 10,917 | $ 10,875
Specific Reserves | $ 275 | $ 351 | $ 275
Residential construction |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of Loans | loan | 0 | 0 | 0
Balance | $ 0 | $ 0 | $ 0
Specific Reserves | $ 0 | $ 0 | $ 0
Home equity line of credit |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of Loans | loan | 4 | 5 | 4
Balance | $ 735 | $ 815 | $ 742
Specific Reserves | $ 0 | $ 22 | $ 0
Consumer |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of Loans | loan | 0 | 0 | 0
Balance | $ 0 | $ 0 | $ 0
Specific Reserves | $ 0 | $ 0 | $ 0

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