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Loans and Allowance for Loan Losses - Impaired Loans and Related Allowance (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Recorded investment in impaired loans: |  |
With no specific allowance recorded | $ 3,877,000 | $ 4,445,000
With a specific allowance recorded | 11,161,000 | 12,481,000
Total recorded investment in impaired loans | 15,038,000 | 16,926,000
Unpaid principal balance of impaired loans: |  |
Total unpaid principal balance of impaired loans | 15,013,000 | 17,019,000
Specific valuation | 778,000 | 513,000
Average recorded investment in impaired loans during the period | 15,977,000 | 17,929,000
Interest income recognized on impaired loans | 837,000 | 825,000
Charged-off portion of impaired loans | 0 | 0
Outstanding commitments to extend credit on impaired loans | 1,100,000 | 935,000
Interest income recognized on impaired loans during the period ended, cash basis | 135,000,000 | 100,000,000
Commercial | Commercial and industrial |  |
Recorded investment in impaired loans: |  |
With no specific allowance recorded | 303,000 | 309,000
With a specific allowance recorded | 1,522,000 | 1,856,000
Total recorded investment in impaired loans | 1,825,000 | 2,165,000
Unpaid principal balance of impaired loans: |  |
Total unpaid principal balance of impaired loans | 1,813,000 | 2,278,000
Specific valuation | 466,000 | 50,000
Average recorded investment in impaired loans during the period | 1,980,000 | 2,113,000
Interest income recognized on impaired loans | 239,000 | 202,000
Commercial real estate | Commercial real estate, owner-occupied |  |
Recorded investment in impaired loans: |  |
With no specific allowance recorded | 0 | 0
With a specific allowance recorded | 6,993,000 | 6,999,000
Total recorded investment in impaired loans | 6,993,000 | 6,999,000
Unpaid principal balance of impaired loans: |  |
Total unpaid principal balance of impaired loans | 6,993,000 | 6,993,000
Specific valuation | 189,000 | 188,000
Average recorded investment in impaired loans during the period | 7,000,000 | 6,998,000
Interest income recognized on impaired loans | 266,000 | 266,000
Commercial real estate | Commercial real estate, investor |  |
Recorded investment in impaired loans: |  |
With no specific allowance recorded | 0 | 0
With a specific allowance recorded | 1,821,000 | 2,171,000
Total recorded investment in impaired loans | 1,821,000 | 2,171,000
Unpaid principal balance of impaired loans: |  |
Total unpaid principal balance of impaired loans | 1,812,000 | 2,168,000
Specific valuation | 45,000 | 159,000
Average recorded investment in impaired loans during the period | 1,904,000 | 2,842,000
Interest income recognized on impaired loans | 83,000 | 87,000
Commercial real estate | Construction |  |
Recorded investment in impaired loans: |  |
With no specific allowance recorded | 2,688,000 | 2,689,000
With a specific allowance recorded | 0 | 280,000
Total recorded investment in impaired loans | 2,688,000 | 2,969,000
Unpaid principal balance of impaired loans: |  |
Total unpaid principal balance of impaired loans | 2,688,000 | 2,963,000
Specific valuation | 0 | 7,000
Average recorded investment in impaired loans during the period | 2,803,000 | 3,132,000
Interest income recognized on impaired loans | 156,000 | 147,000
Residential loans | Home equity |  |
Recorded investment in impaired loans: |  |
With no specific allowance recorded | 313,000 | 406,000
With a specific allowance recorded | 251,000 | 347,000
Total recorded investment in impaired loans | 564,000 | 753,000
Unpaid principal balance of impaired loans: |  |
Total unpaid principal balance of impaired loans | 562,000 | 750,000
Specific valuation | 5,000 | 6,000
Average recorded investment in impaired loans during the period | 671,000 | 679,000
Interest income recognized on impaired loans | 19,000 | 24,000
Residential loans | Other residential |  |
Recorded investment in impaired loans: |  |
With no specific allowance recorded | 462,000 | 995,000
With a specific allowance recorded | 0 | 153,000
Total recorded investment in impaired loans | 462,000 | 1,148,000
Unpaid principal balance of impaired loans: |  |
Total unpaid principal balance of impaired loans | 461,000 | 1,147,000
Specific valuation | 0 | 1,000
Average recorded investment in impaired loans during the period | 915,000 | 1,324,000
Interest income recognized on impaired loans | 45,000 | 62,000
Consumer loans | Installment and other consumer |  |
Recorded investment in impaired loans: |  |
With no specific allowance recorded | 111,000 | 46,000
With a specific allowance recorded | 574,000 | 675,000
Total recorded investment in impaired loans | 685,000 | 721,000
Unpaid principal balance of impaired loans: |  |
Total unpaid principal balance of impaired loans | 684,000 | 720,000
Specific valuation | 73,000 | 102,000
Average recorded investment in impaired loans during the period | 704,000 | 841,000
Interest income recognized on impaired loans | $ 29,000 | $ 37,000

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- Definition Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5258-111524 + Details
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