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Loans and Allowance for Credit Losses (Rollforward of TDRs) (Details) - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2016 | Sep. 30, 2015
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance | $ 20,923 | $ 23,748
New TDRs | 3,630 | 1,837
Disbursements (Payments) | (3,263) | (1,091)
Charge offs | (638) | (1,098)
Reclassifications/Transfer In/(Out) |  | (1,525)
Payoffs | (179) |
TDR ending balance | 20,473 | 21,871
TDR, Related Allowance | 1,211 | 1,152
Impaired Nonaccrual Loans [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance | 5,428 | 7,074
New TDRs | 2,570 |
Disbursements (Payments) | (2,329) | (234)
Charge offs | (521) | (1,098)
Reclassifications/Transfer In/(Out) | 2,053 | (302)
TDR ending balance | 7,201 | 5,440
TDR, Related Allowance | 947 | 732
Impaired Nonaccrual Loans [Member] | Residential Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance | 445 | 3,382
Disbursements (Payments) | (294) | (21)
Reclassifications/Transfer In/(Out) | 1,595 | (2,911)
TDR ending balance | 1,746 | 450
TDR, Related Allowance | 25 | 89
Impaired Nonaccrual Loans [Member] | Commercial Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance |  | 346
Disbursements (Payments) |  | (4)
Charge offs | (258) | (40)
Reclassifications/Transfer In/(Out) | 458 | (302)
TDR ending balance | 200 |
TDR, Related Allowance | 112 |
Impaired Nonaccrual Loans [Member] | Consumer Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance | 23 | 25
Disbursements (Payments) | (23) | (2)
TDR ending balance |  | 23
Impaired Nonaccrual Loans [Member] | Construction Loans [Member] | Commercial and Residential Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance | 4,960 | 3,321
New TDRs | 2,570 |
Disbursements (Payments) | (2,012) | (207)
Charge offs | (263) | (1,058)
Reclassifications/Transfer In/(Out) |  | 2,911
TDR ending balance | 5,255 | 4,967
TDR, Related Allowance | 810 | 643
Impaired Accruing Restructured Loans [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance | 15,495 | 16,674
New TDRs | 1,060 | 1,837
Disbursements (Payments) | (934) | (857)
Charge offs | (117) |
Reclassifications/Transfer In/(Out) | (2,053) | (1,223)
Payoffs | (179) |
TDR ending balance | 13,272 | 16,431
TDR, Related Allowance | 264 | 420
Impaired Accruing Restructured Loans [Member] | Residential Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance | 5,686 | 6,368
New TDRs | 565 | 1,837
Disbursements (Payments) | (375) | (206)
Reclassifications/Transfer In/(Out) | (1,595) | (1,324)
Payoffs | (179) |
TDR ending balance | 4,102 | 6,675
TDR, Related Allowance | 154 | 207
Impaired Accruing Restructured Loans [Member] | Commercial Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance | 5,740 | 6,237
New TDRs | 495 |
Disbursements (Payments) | (689) | (562)
Charge offs | (117) |
Reclassifications/Transfer In/(Out) | (458) |
TDR ending balance | 4,971 | 5,675
TDR, Related Allowance | 89 | 180
Impaired Accruing Restructured Loans [Member] | Commercial Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance |  | 47
Disbursements (Payments) |  | (6)
Reclassifications/Transfer In/(Out) |  | (41)
Impaired Accruing Restructured Loans [Member] | Construction Loans [Member] | Commercial and Residential Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance | 4,069 | 4,022
Disbursements (Payments) | 130 | (83)
Reclassifications/Transfer In/(Out) |  | 142
TDR ending balance | 4,199 | 4,081
TDR, Related Allowance | $ 21 | $ 33

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