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Loans - TDRs by Class and Specific Reserve (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 USD ($) loan | Dec. 31, 2015 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Number of Loans | loan | 71 | 84
Balance | $ 21,526 | $ 23,923
Specific Reserves | $ 736 | $ 455
Commercial | Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Number of Loans | loan | 10 | 15
Balance | $ 8,937 | $ 10,350
Specific Reserves | $ 375 | $ 85
Commercial | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Number of Loans | loan | 1 | 1
Balance | $ 763 | $ 788
Specific Reserves | $ 100 | $ 94
Commercial | Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Number of Loans | loan | 5 | 11
Balance | $ 779 | $ 1,168
Specific Reserves | $ 0 | $ 1
Municipal |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Number of Loans | loan | 0 | 0
Balance | $ 0 | $ 0
Specific Reserves | $ 0 | $ 0
Residential | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Number of Loans | loan | 0 | 0
Balance | $ 0 | $ 0
Specific Reserves | $ 0 | $ 0
Residential | Term |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Number of Loans | loan | 52 | 53
Balance | $ 10,503 | $ 10,875
Specific Reserves | $ 261 | $ 275
Home Equity LIne of Credit |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Number of Loans | loan | 3 | 4
Balance | $ 544 | $ 742
Specific Reserves | $ 0 | $ 0
Consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Number of Loans | loan | 0 | 0
Balance | $ 0 | $ 0
Specific Reserves | $ 0 | $ 0

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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953676-111524 + Details
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