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Commitments and Contingencies (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015
Commitments and Contingencies [Line Items] |  |
Loans and Leases Receivable, Commitments, Fixed Rates | $ 55,830 | $ 47,231
Loans and Leases Receivable, Commitments, Variable Rates | 66,190 | 64,373
Loans And Leases Receivable Commitments | 122,020 | 111,604
Residential Real Estate Including Home Equity [Member] |  |
Commitments and Contingencies [Line Items] |  |
Loans and Leases Receivable, Commitments, Fixed Rates | 32,147 | 21,638
Loans and Leases Receivable, Commitments, Variable Rates | 10,715 | 6,590
Loans And Leases Receivable Commitments | 42,862 | 28,228
Consumer Loan [Member] |  |
Commitments and Contingencies [Line Items] |  |
Loans and Leases Receivable, Commitments, Fixed Rates | 15,332 | 11,796
Loans and Leases Receivable, Commitments, Variable Rates | 0 | 0
Loans And Leases Receivable Commitments | 15,332 | 11,796
Commercial Real Estate [Member] |  |
Commitments and Contingencies [Line Items] |  |
Loans and Leases Receivable, Commitments, Fixed Rates | 7,263 | 12,619
Loans and Leases Receivable, Commitments, Variable Rates | 13,084 | 18,170
Loans And Leases Receivable Commitments | 20,347 | 30,789
Commercial Participations Purchased [Member] |  |
Commitments and Contingencies [Line Items] |  |
Loans and Leases Receivable, Commitments, Fixed Rates | 83 | 83
Loans and Leases Receivable, Commitments, Variable Rates | 917 | 0
Loans And Leases Receivable Commitments | 1,000 | 83
Commercial business [Member] |  |
Commitments and Contingencies [Line Items] |  |
Loans and Leases Receivable, Commitments, Fixed Rates | 1,005 | 1,095
Loans and Leases Receivable, Commitments, Variable Rates | 41,474 | 39,613
Loans And Leases Receivable Commitments | $ 42,479 | $ 40,708

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