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Loans - TDR's by Class and Specific Reserves (Details) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2017 USD ($) loan | Jun. 30, 2016 USD ($) loan | Dec. 31, 2016 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivable Modifications Number Of Contracts Greater Than30 Days Past Due Place In T D R In Previous12 Months | loan | 10 | 1 |
Financing Receivable Recorded Investment Greater Than30 Days Past Due Placed In T D R In Previous12 Months | $ 1,336 | $ 108 |
Number of Loans (loan) | loan | 68 | 78 | 71
Balance | $ 20,301 | $ 22,595 | $ 21,526
Specific Reserves | $ 406 | $ 544 | $ 736
Commercial | Real estate |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivable Modifications Number Of Contracts Greater Than30 Days Past Due Place In T D R In Previous12 Months | loan | 0 | 0 |
Financing Receivable Recorded Investment Greater Than30 Days Past Due Placed In T D R In Previous12 Months | $ 0 | $ 0 |
Number of Loans (loan) | loan | 9 | 11 | 10
Balance | $ 8,040 | $ 9,459 | $ 8,937
Specific Reserves | $ 93 | $ 105 | $ 375
Commercial | Construction |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivable Modifications Number Of Contracts Greater Than30 Days Past Due Place In T D R In Previous12 Months | loan | 0 | 0 |
Financing Receivable Recorded Investment Greater Than30 Days Past Due Placed In T D R In Previous12 Months | $ 0 | $ 0 |
Number of Loans (loan) | loan | 1 | 1 | 1
Balance | $ 763 | $ 788 | $ 763
Specific Reserves | $ 103 | $ 97 | $ 100
Commercial | Other |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivable Modifications Number Of Contracts Greater Than30 Days Past Due Place In T D R In Previous12 Months | loan | 0 | 1 |
Financing Receivable Recorded Investment Greater Than30 Days Past Due Placed In T D R In Previous12 Months | $ 0 | $ 10 |
Number of Loans (loan) | loan | 5 | 10 | 5
Balance | $ 749 | $ 1,101 | $ 779
Specific Reserves | $ 1 | $ 78 | $ 0
Municipal |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivable Modifications Number Of Contracts Greater Than30 Days Past Due Place In T D R In Previous12 Months | loan | 0 | 0 |
Financing Receivable Recorded Investment Greater Than30 Days Past Due Placed In T D R In Previous12 Months | $ 0 | $ 0 |
Number of Loans (loan) | loan | 0 | 0 | 0
Balance | $ 0 | $ 0 | $ 0
Specific Reserves | $ 0 | $ 0 | $ 0
Residential | Construction |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivable Modifications Number Of Contracts Greater Than30 Days Past Due Place In T D R In Previous12 Months | loan | 0 | 0 |
Financing Receivable Recorded Investment Greater Than30 Days Past Due Placed In T D R In Previous12 Months | $ 0 | $ 0 |
Number of Loans (loan) | loan | 0 | 0 | 0
Balance | $ 0 | $ 0 | $ 0
Specific Reserves | $ 0 | $ 0 | $ 0
Residential | Term |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivable Modifications Number Of Contracts Greater Than30 Days Past Due Place In T D R In Previous12 Months | loan | 9 | 8 |
Financing Receivable Recorded Investment Greater Than30 Days Past Due Placed In T D R In Previous12 Months | $ 1,169 | $ 969 |
Number of Loans (loan) | loan | 50 | 53 | 52
Balance | $ 10,227 | $ 10,693 | $ 10,503
Specific Reserves | $ 209 | $ 264 | $ 261
Home equity line of credit |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivable Modifications Number Of Contracts Greater Than30 Days Past Due Place In T D R In Previous12 Months | loan | 1 | 0 |
Financing Receivable Recorded Investment Greater Than30 Days Past Due Placed In T D R In Previous12 Months | $ 167 | $ 0 |
Number of Loans (loan) | loan | 3 | 3 | 3
Balance | $ 522 | $ 554 | $ 544
Specific Reserves | $ 0 | $ 0 | $ 0
Consumer |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivable Modifications Number Of Contracts Greater Than30 Days Past Due Place In T D R In Previous12 Months | loan | 0 | 0 |
Financing Receivable Recorded Investment Greater Than30 Days Past Due Placed In T D R In Previous12 Months | $ 0 | $ 0 |
Number of Loans (loan) | loan | 0 | 0 | 0
Balance | $ 0 | $ 0 | $ 0
Specific Reserves | $ 0 | $ 0 | $ 0

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