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Loans and Allowance for Credit Losses (Impaired Financing Receivables by Loan Class) (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | $ 26,112 |  | $ 26,160
Recorded investment with no allowance | 11,361 |  | 10,896
Recorded investment with an allowance | 10,150 |  | 11,076
Related allowance | 1,148 |  | 2,141
Average recorded investment | 21,399 | $ 27,419 |
Interest income recognized | 130 | 126 |
Impaired Nonaccrual Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 13,330 |  | 13,160
Recorded investment with no allowance | 3,345 |  | 3,015
Recorded investment with an allowance | 5,384 |  | 5,957
Related allowance | 899 |  | 1,904
Average recorded investment | 8,547 | 12,346 |
Impaired Accruing Restructured Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 12,782 |  | 13,000
Recorded investment with no allowance | 8,016 |  | 7,881
Recorded investment with an allowance | 4,766 |  | 5,119
Related allowance | 249 |  | 237
Average recorded investment | 12,852 | 15,073 |
Interest income recognized | 130 | 126 |
Residential Portfolio Segment [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 8,195 |  | 7,888
Recorded investment with no allowance | 5,354 |  | 4,786
Recorded investment with an allowance | 2,620 |  | 2,992
Related allowance | 282 |  | 317
Average recorded investment | 7,772 | 7,961 |
Interest income recognized | 43 | 55 |
Residential Portfolio Segment [Member] | Impaired Nonaccrual Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 4,491 |  | 4,013
Recorded investment with no allowance | 2,689 |  | 1,957
Recorded investment with an allowance | 1,581 |  | 1,946
Related allowance | 134 |  | 166
Average recorded investment | 4,010 | 2,292 |
Residential Portfolio Segment [Member] | Impaired Accruing Restructured Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 3,704 |  | 3,875
Recorded investment with no allowance | 2,665 |  | 2,829
Recorded investment with an allowance | 1,039 |  | 1,046
Related allowance | 148 |  | 151
Average recorded investment | 3,762 | 5,669 |
Interest income recognized | 43 | 55 |
Commercial Real Estate Portfolio Segment [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 6,112 |  | 6,737
Recorded investment with no allowance | 2,358 |  | 2,532
Recorded investment with an allowance | 3,197 |  | 3,556
Related allowance | 183 |  | 185
Average recorded investment | 5,629 | 7,922 |
Interest income recognized | 57 | 46 |
Commercial Real Estate Portfolio Segment [Member] | Impaired Nonaccrual Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 1,213 |  | 1,801
Recorded investment with no allowance | 481 |  | 959
Recorded investment with an allowance | 175 |  | 193
Related allowance | 99 |  | 117
Average recorded investment | 721 | 2,559 |
Commercial Real Estate Portfolio Segment [Member] | Impaired Accruing Restructured Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 4,899 |  | 4,936
Recorded investment with no allowance | 1,877 |  | 1,573
Recorded investment with an allowance | 3,022 |  | 3,363
Related allowance | 84 |  | 68
Average recorded investment | 4,908 | 5,363 |
Interest income recognized | 57 | 46 |
Commercial Portfolio Segment [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Average recorded investment |  | 158 |
Commercial Portfolio Segment [Member] | Impaired Nonaccrual Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Average recorded investment |  | 158 |
Commercial Portfolio Segment [Member] | Impaired Accruing Restructured Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance |  |  |
Recorded investment with no allowance |  |  |
Recorded investment with an allowance |  |  |
Related allowance |  |  |
Average recorded investment |  |  |
Interest income recognized |  |  |
Consumer Portfolio Segment [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 99 |  | 99
Recorded investment with no allowance | 99 |  | 99
Average recorded investment | 99 | 121 |
Consumer Portfolio Segment [Member] | Impaired Nonaccrual Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 99 |  | 99
Recorded investment with no allowance | 99 |  | 99
Average recorded investment | 99 | 121 |
Consumer Portfolio Segment [Member] | Impaired Accruing Restructured Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance |  |  |
Recorded investment with no allowance |  |  |
Recorded investment with an allowance |  |  |
Related allowance |  |  |
Average recorded investment |  |  |
Interest income recognized |  |  |
Construction Loans [Member] | Commercial and Residential Real Estate Portfolio Segment [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 11,706 |  | 11,436
Recorded investment with no allowance | 3,550 |  | 3,479
Recorded investment with an allowance | 4,333 |  | 4,528
Related allowance | 683 |  | 1,639
Average recorded investment | 7,899 | 11,257 |
Interest income recognized | 30 | 25 |
Construction Loans [Member] | Commercial and Residential Real Estate Portfolio Segment [Member] | Impaired Nonaccrual Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 7,527 |  | 7,247
Recorded investment with no allowance | 76 |  |
Recorded investment with an allowance | 3,628 |  | 3,818
Related allowance | 666 |  | 1,621
Average recorded investment | 3,717 | 7,216 |
Construction Loans [Member] | Commercial and Residential Real Estate Portfolio Segment [Member] | Impaired Accruing Restructured Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 4,179 |  | 4,189
Recorded investment with no allowance | 3,474 |  | 3,479
Recorded investment with an allowance | 705 |  | 710
Related allowance | 17 |  | $ 18
Average recorded investment | 4,182 | 4,041 |
Interest income recognized | $ 30 | $ 25 |

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