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Loans and Allowance for Loan Losses (Tables) | 12 Months Ended
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Dec. 31, 2018
Financing Receivable, Allowance for Credit Losses [Line Items] |
Summary of composition of loan portfolio |
|  | December 31,
(dollars in thousands) |  | 2018 |  | 2017
Commercial |  |  |  |  |  |  |  |  |  |  |  |  |
Owner occupied RE |  | $ | 367,018 |  |  | 21.9 | % |  | 316,818 |  |  | 22.8 | %
Non-owner occupied RE |  |  | 404,296 |  |  | 24.1 | % |  | 312,798 |  |  | 22.6 | %
Construction |  |  | 84,411 |  |  | 5.0 | % |  | 51,179 |  |  | 3.7 | %
Business |  |  | 272,980 |  |  | 16.3 | % |  | 226,158 |  |  | 16.3 | %
Total commercial loans |  |  | 1,128,705 |  |  | 67.3 | % |  | 906,953 |  |  | 65.4 | %
Consumer |  |  |  |  |  |  |  |  |  |  |  |  |
Real estate |  |  | 320,943 |  |  | 19.1 | % |  | 273,050 |  |  | 19.7 | %
Home equity |  |  | 165,937 |  |  | 9.9 | % |  | 156,141 |  |  | 11.3 | %
Construction |  |  | 37,925 |  |  | 2.3 | % |  | 28,351 |  |  | 2.0 | %
Other |  |  | 23,822 |  |  | 1.4 | % |  | 22,575 |  |  | 1.6 | %
Total consumer loans |  |  | 548,627 |  |  | 32.7 | % |  | 480,117 |  |  | 34.6 | %
Total gross loans, net of deferred fees |  |  | 1,677,332 |  |  | 100.0 | % |  | 1,387,070 |  |  | 100.0 | %
Less – allowance for loan losses |  |  | (15,762 | ) |  |  |  |  | (15,523 | ) |  |  |
Total loans, net |  | $ | 1,661,570 |  |  |  |  |  | 1,371,547 |  |  |
Composition of gross loans by rate type |
|  | December 31,
(dollars in thousands) |  | 2018 |  | 2017
Variable rate loans |  | $ | 402,148 |  | 349,493
Fixed rate loans |  |  | 1,275,184 |  | 1,037,577
|  | $ | 1,677,332 |  | 1,387,070
Summary of nonperforming assets, including nonaccruing TDRs |
|  | December 31,
(dollars in thousands) |  | 2018 |  | 2017
Commercial |  |  |  |  |
Owner occupied RE |  | $ | - |  | -
Non-owner occupied RE |  |  | 210 |  | 1,581
Construction |  |  | - |  | -
Business |  |  | 81 |  | 910
Consumer |  |  |  |  |
Real estate |  |  | 1,980 |  | 992
Home equity |  |  | 1,006 |  | 1,144
Construction |  |  | - |  | -
Other |  |  | 12 |  | 1
Nonaccruing troubled debt restructurings |  |  | 2,541 |  | 2,673
Total nonaccrual loans, including nonaccruing TDRs |  |  | 5,830 |  | 7,301
Other real estate owned |  |  | - |  | 242
Total nonperforming assets |  | $ | 5,830 |  | 7,543
Nonperforming assets as a percentage of: |  |  |  |  |
Total assets |  |  | 0.31% |  | 0.46%
Gross loans |  |  | 0.35% |  | 0.54%
Total loans over 90 days past due |  | $ | 458 |  | 2,027
Loans over 90 days past due and still accruing |  |  | - |  | -
Accruing TDRs |  |  | 6,742 |  | 5,145
Summary of key information for impaired loans |
|  |  |  |  | December 31, 2018
|  |  |  |  | Recorded investment |  |
|  |  |  |  |  |  | Impaired loans |  |
|  | Unpaid |  |  |  | with related |  | Related
|  | Principal |  | Impaired |  | allowance for |  | allowance for
(dollars in thousands) |  | Balance |  | loans |  | loan losses |  | loan losses
Commercial |  |  |  |  |  |  |  |  |
Owner occupied RE |  | $ | 2,827 |  | 2,762 |  | 451 |  | 75
Non-owner occupied RE |  |  | 3,321 |  | 2,807 |  | 2,204 |  | 558
Construction |  |  | - |  | - |  | - |  | -
Business |  |  | 3,745 |  | 2,520 |  | 2,005 |  | 895
Total commercial |  |  | 9,893 |  | 8,089 |  | 4,660 |  | 1,528
Consumer |  |  |  |  |  |  |  |  |
Real estate |  |  | 2,993 |  | 2,892 |  | 1,398 |  | 456
Home equity |  |  | 1,935 |  | 1,421 |  | - |  | -
Construction |  |  | - |  | - |  | - |  | -
Other |  |  | 170 |  | 170 |  | 170 |  | 30
Total consumer |  |  | 5,098 |  | 4,483 |  | 1,568 |  | 486
Total |  | $ | 14,991 |  | 12,572 |  | 6,228 |  | 2,014
|  | December 31, 2017
|  |  |  |  | Recorded investment |  |
|  |  |  |  |  |  | Impaired loans |  |
|  | Unpaid |  |  |  | with related |  | Related
|  | Principal |  | Impaired |  | allowance for |  | allowance for
(dollars in thousands) |  | Balance |  | loans |  | loan losses |  | loan losses
Commercial |  |  |  |  |  |  |  |  |
Owner occupied RE |  | $ | 2,281 |  | 2,235 |  | 464 |  | 179
Non-owner occupied RE |  |  | 6,827 |  | 3,665 |  | 2,646 |  | 750
Construction |  |  | - |  | - |  | - |  | -
Business |  |  | 3,735 |  | 2,764 |  | 1,993 |  | 1,061
Total commercial |  |  | 12,843 |  | 8,664 |  | 5,103 |  | 1,990
Consumer |  |  |  |  |  |  |  |  |
Real estate |  |  | 2,062 |  | 2,037 |  | 2,037 |  | 1,379
Home equity |  |  | 2,010 |  | 1,575 |  | 680 |  | 286
Construction |  |  | - |  | - |  | - |  | -
Other |  |  | 171 |  | 170 |  | 170 |  | 22
Total consumer |  |  | 4,243 |  | 3,782 |  | 2,887 |  | 1,687
Total |  | $ | 17,086 |  | 12,446 |  | 7,990 |  | 3,677
Summary of average recorded investment and interest income recognized on impaired loans |
|  | Year ended December 31,
|  | 2018 |  | 2017 |  | 2016
|  | Average |  | Recognized |  | Average |  | Recognized |  | Average |  | Recognized
|  | recorded |  | interest |  | recorded |  | interest |  | recorded |  | interest
(dollars in thousands) |  | investment |  | income |  | investment |  | income |  | investment |  | income
Commercial |  |  |  |  |  |  |  |  |  |  |  |  |
Owner occupied RE |  | $ | 2,784 |  | 142 |  | 2,255 |  | 104 |  | 2,263 |  | 112
Non-owner occupied RE |  |  | 2,860 |  | 174 |  | 4,144 |  | 199 |  | 4,106 |  | 200
Construction |  |  | - |  | - |  | - |  | - |  | - |  | -
Business |  |  | 2,883 |  | 162 |  | 2,823 |  | 162 |  | 2,873 |  | 135
Total commercial |  |  | 8,527 |  | 478 |  | 9,222 |  | 465 |  | 9,242 |  | 447
Consumer |  |  |  |  |  |  |  |  |  |  |  |  |
Real estate |  |  | 2,930 |  | 151 |  | 2,047 |  | 69 |  | 1,854 |  | 81
Home equity |  |  | 1,453 |  | 99 |  | 1,576 |  | 97 |  | 257 |  | 2
Construction |  |  | - |  | - |  | - |  | - |  | - |  | -
Other |  |  | 174 |  | 5 |  | 174 |  | 6 |  | 203 |  | 6
Total consumer |  |  | 4,557 |  | 255 |  | 3,797 |  | 172 |  | 2,314 |  | 89
Total |  | $ | 13,084 |  | 733 |  | 13,019 |  | 637 |  | 11,556 |  | 536
Summary of activity related to allowance for loan losses |
|  | Year ended December 31, |
(dollars in thousands) |  | 2018 |  |  | 2017 |  |  | 2016 |
Balance, beginning of period |  | $ | 15,523 |  |  | 14,855 |  |  | 13,629 |
Provision for loan losses |  |  | 1,900 |  |  | 2,000 |  |  | 2,300 |
Loan charge-offs: |  |  |  |  |  |  |  |  |  |
Commercial |  |  |  |  |  |  |  |  |  |
Owner occupied RE |  |  | - |  |  | - |  |  | (5 | )
Non-owner occupied RE |  |  | (432 | ) |  | (589 | ) |  | (100 | )
Construction |  |  | - |  |  | - |  |  | (42 | )
Business |  |  | (695 | ) |  | (638 | ) |  | (1,031 | )
Total commercial |  |  | (1,127 | ) |  | (1,227 | ) |  | (1,178 | )
Consumer |  |  |  |  |  |  |  |  |  |
Real estate |  |  | (749 | ) |  | - |  |  | (194 | )
Home equity |  |  | (217 | ) |  | (400 | ) |  | (66 | )
Construction |  |  | - |  |  | - |  |  | - |
Other |  |  | (53 | ) |  | (11 | ) |  | (210 | )
Total consumer |  |  | (1,019 | ) |  | (411 | ) |  | (470 | )
Total loan charge-offs |  |  | (2,146 | ) |  | (1,638 | ) |  | (1,648 | )
Loan recoveries: |  |  |  |  |  |  |  |  |  |
Commercial |  |  |  |  |  |  |  |  |  |
Owner occupied RE |  |  | - |  |  | - |  |  | - |
Non-owner occupied RE |  |  | 132 |  |  | 119 |  |  | 155 |
Construction |  |  | - |  |  | - |  |  | - |
Business |  |  | 229 |  |  | 86 |  |  | 403 |
Total commercial |  |  | 361 |  |  | 205 |  |  | 558 |
Consumer |  |  |  |  |  |  |  |  |  |
Real estate |  |  | 5 |  |  | 86 |  |  | 10 |
Home equity |  |  | 115 |  |  | 13 |  |  | 1 |
Construction |  |  | - |  |  | - |  |  | - |
Other |  |  | 4 |  |  | 2 |  |  | 5 |
Total consumer |  |  | 124 |  |  | 101 |  |  | 16 |
Total recoveries |  |  | 485 |  |  | 306 |  |  | 574 |
Net loan charge-offs |  |  | (1,661 | ) |  | (1,332 | ) |  | (1,074 | )
Balance, end of period |  | $ | 15,762 |  |  | 15,523 |  |  | 14,855
Summary of allowance for loan losses by commercial and consumer portfolio segments |
|  | Year ended December 31, 2018 |
(dollars in thousands) |  | Commercial |  |  | Consumer |  |  | Unallocated |  | Total |
Balance, beginning of period |  | $ | 9,937 |  |  | 5,586 |  |  | - |  | 15,523 |
Provision |  |  | 1,597 |  |  | 303 |  |  | - |  | 1,900 |
Loan charge-offs |  |  | (1,127 | ) |  | (1,019 | ) |  | - |  | (2,146 | )
Loan recoveries |  |  | 361 |  |  | 124 |  |  | - |  | 485 |
Net loan charge-offs |  |  | (766 | ) |  | (895 | ) |  | - |  | (1,661 | )
Balance, end of period |  | $ | 10,768 |  |  | 4,994 |  |  | - |  | 15,762 |
|  | Year ended December 31, 2017 |
|  | Commercial |  |  | Consumer |  |  | Unallocated |  | Total |
Balance, beginning of period |  | $ | 10,039 |  |  | 4,816 |  |  | - |  | 14,855 |
Provision |  |  | 920 |  |  | 1,080 |  |  | - |  | 2,000 |
Loan charge-offs |  |  | (1,227 | ) |  | (411 | ) |  | - |  | (1,638 | )
Loan recoveries |  |  | 205 |  |  | 101 |  |  | - |  | 306 |
Net loan charge-offs |  |  | (1,022 | ) |  | (310 | ) |  | - |  | (1,332 | )
Balance, end of period |  | $ | 9,937 |  |  | 5,586 |  |  | - |  | 15,523
Summary of allowance for loan losses and recorded investment in loans by impairment methodology |
|  | December 31, 2018
|  | Allowance for loan losses |  | Recorded investment in loans
(dollars in thousands) |  | Commercial |  | Consumer |  | Total |  | Commercial |  | Consumer |  | Total
Individually evaluated |  | $ | 1,528 |  | 486 |  | 2,014 |  | 8,089 |  | 4,483 |  | 12,572
Collectively evaluated |  |  | 9,240 |  | 4,508 |  | 13,748 |  | 1,120,616 |  | 544,144 |  | 1,664,760
Total |  | $ | 10,768 |  | 4,994 |  | 15,762 |  | 1,128,705 |  | 548,627 |  | 1,677,332
|  | December 31, 2017
|  | Allowance for loan losses |  | Recorded investment in loans
|  | Commercial |  | Consumer |  | Total |  | Commercial |  | Consumer |  | Total
Individually evaluated |  | $ | 1,990 |  | 1,687 |  | 3,677 |  | 8,664 |  | 3,782 |  | 12,446
Collectively evaluated |  |  | 7,947 |  | 3,899 |  | 11,846 |  | 898,289 |  | 476,335 |  | 1,374,624
Total |  | $ | 9,937 |  | 5,586 |  | 15,523 |  | 906,953 |  | 480,117 |  | 1,387,070
Commercial [Member] |
Financing Receivable, Allowance for Credit Losses [Line Items] |
Outstanding commercial and consumer loans which include loans on nonaccrual by past due status |
|  | December 31, 2018
|  | Owner |  | Non-owner |  |  |  |  |  |
(dollars in thousands) |  | occupied RE |  | occupied RE |  | Construction |  | Business |  | Total
Current |  | $ | 367,018 |  | 404,179 |  | 84,411 |  | 272,864 |  | 1,128,472
30-59 days past due |  |  | - |  | 117 |  | - |  | 36 |  | 153
60-89 days past due |  |  | - |  | - |  | - |  | - |  | -
Greater than 90 days |  |  | - |  | - |  | - |  | 80 |  | 80
|  | $ | 367,018 |  | 404,296 |  | 84,411 |  | 272,980 |  | 1,128,705
|  | December 31, 2017
|  | Owner |  | Non-owner |  |  |  |  |  |
|  | occupied RE |  | occupied RE |  | Construction |  | Business |  | Total
Current |  | $ | 316,818 |  | 312,477 |  | 51,179 |  | 224,861 |  | 905,335
30-59 days past due |  |  | - |  | 129 |  | - |  | 416 |  | 545
60-89 days past due |  |  | - |  | - |  | - |  | - |  | -
Greater than 90 days |  |  | - |  | 192 |  | - |  | 881 |  | 1,073
|  | $ | 316,818 |  | 312,798 |  | 51,179 |  | 226,158 |  | 906,953
Summary of breakdown of outstanding loans by risk category |
|  | December 31, 2018
|  | Owner |  | Non-owner |  |  |  |  |  |
(dollars in thousands) |  | occupied RE |  | occupied RE |  | Construction |  | Business |  | Total
Pass |  | $ | 363,621 |  | 400,266 |  | 84,411 |  | 266,898 |  | 1,115,196
Special Mention |  |  | 296 |  | 118 |  | - |  | 2,971 |  | 3,385
Substandard |  |  | 3,101 |  | 3,912 |  | - |  | 3,111 |  | 10,124
Doubtful |  |  | - |  | - |  | - |  | - |  | -
|  | $ | 367,018 |  | 404,296 |  | 84,411 |  | 272,980 |  | 1,128,705
|  | December 31, 2017
|  | Owner |  | Non-owner |  |  |  |  |  |
|  | occupied RE |  | occupied RE |  | Construction |  | Business |  | Total
Pass |  | $ | 312,628 |  | 306,965 |  | 51,179 |  | 215,729 |  | 886,501
Special Mention |  |  | 1,770 |  | 2,082 |  | - |  | 5,540 |  | 9,392
Substandard |  |  | 2,420 |  | 3,751 |  | - |  | 4,889 |  | 11,060
Doubtful |  |  | - |  | - |  | - |  | - |  | -
|  | $ | 316,818 |  | 312,798 |  | 51,179 |  | 226,158 |  | 906,953
Consumer [Member] |
Financing Receivable, Allowance for Credit Losses [Line Items] |
Outstanding commercial and consumer loans which include loans on nonaccrual by past due status |
|  | December 31, 2018
(dollars in thousands) |  | Real estate |  | Home equity |  | Construction |  | Other |  | Total
Current |  | $ | 317,267 |  | 165,727 |  | 37,925 |  | 23,603 |  | 544,522
30-59 days past due |  |  | 2,555 |  | 30 |  | - |  | 106 |  | 2,691
60-89 days past due |  |  | 923 |  | - |  | - |  | 113 |  | 1,036
Greater than 90 days |  |  | 198 |  | 180 |  | - |  | - |  | 378
|  | $ | 320,943 |  | 165,937 |  | 37,925 |  | 23,822 |  | 548,627
|  | December 31, 2017
|  | Real estate |  | Home equity |  | Construction |  | Other |  | Total
Current |  | $ | 271,284 |  | 154,821 |  | 28,351 |  | 22,506 |  | 476,962
30-59 days past due |  |  | 681 |  | 325 |  | - |  | 69 |  | 1,075
60-89 days past due |  |  | 131 |  | 995 |  | - |  | - |  | 1,126
Greater than 90 days |  |  | 954 |  | - |  | - |  | - |  | 954
|  | $ | 273,050 |  | 156,141 |  | 28,351 |  | 22,575 |  | 480,117
Summary of breakdown of outstanding loans by risk category |
|  | December 31, 2018
(dollars in thousands) |  | Real estate |  | Home equity |  | Construction |  | Other |  | Total
Pass |  | $ | 314,586 |  | 162,626 |  | 37,925 |  | 23,586 |  | 538,723
Special Mention |  |  | 1,792 |  | 864 |  | - |  | 139 |  | 2,795
Substandard |  |  | 4,565 |  | 2,447 |  | - |  | 97 |  | 7,109
Doubtful |  |  | - |  | - |  | - |  | - |  | -
Loss |  |  | - |  | - |  | - |  | - |  | -
|  | $ | 320,943 |  | 165,937 |  | 37,925 |  | 23,822 |  | 548,627
|  | December 31, 2017
(dollars in thousands) |  | Real estate |  | Home equity |  | Construction |  | Other |  | Total
Pass |  | $ | 269,422 |  | 152,545 |  | 28,351 |  | 22,367 |  | 472,685
Special Mention |  |  | 715 |  | 1,025 |  | - |  | 88 |  | 1,828
Substandard |  |  | 2,913 |  | 2,571 |  | - |  | 120 |  | 5,604
Doubtful |  |  | - |  | - |  | - |  | - |  | -
Loss |  |  | - |  | - |  | - |  | - |  | -
|  | $ | 273,050 |  | 156,141 |  | 28,351 |  | 22,575 |  | 480,117

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