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Loans, Balance in Allowance for Loan and Lease Losses and Recorded Investment in Loans (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2020 | Mar. 31, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019
Allowance for loan losses [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  |  | $ 35,096 | $ 34,998 | $ 35,096 |  | $ 35,908 | $ 35,908
Provision charged to expense |  |  |  | 1,253 |  |  | 3,006 | 4,819
Losses charged off |  |  |  | (2,316) |  |  | (7,168) | (9,736)
Recoveries |  |  |  | 876 |  |  | 3,065 | 4,105
Ending balance | $ 47,986 | [1] |  | 34,811 | 47,986 | [1] | 34,811 | 35,096
Ending balance [Abstract] |  |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  | 672 |  |  | 672 | 1,212
Collectively evaluated for impairment |  |  |  | 34,139 |  |  | 34,139 | 33,884
Loans ending balance [Abstract] |  |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  | 56,315 |  |  | 56,315 | 57,771
Collectively evaluated for impairment |  |  |  | 3,158,470 |  |  | 3,158,470 | 3,190,893
Increase (decrease) in allowance for credit loss balance | 2,500 |  |  |  | $ 1,200 |  |  |
Period of reasonable and supportable forecast |  |  |  |  | 12 months |  |  |
Increase (decrease) in allowance for credit losses | $ 1,400 |  |  |  |  |  |  |
Increase (decrease) in allowance for credit losses, percentage | 300.00% |  |  |  |  |  |  |
Allocations to allowance for credit losses | $ 2,433 |  |  | 1,253 | $ 15,091 | [2] | 3,006 |
Real Estate Mortgage [Member] |  |  |  |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  |  | 5,501 |  | 5,501 |  |  |
Ending balance |  |  |  |  |  |  |  | 5,501
Consumer Direct [Member] |  |  |  |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  |  | 1,711 |  | 1,711 |  |  |
Ending balance |  |  |  |  |  |  |  | 1,711
Consumer Indirect [Member] |  |  |  |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  |  | 6,201 |  | 6,201 |  |  |
Ending balance |  |  |  |  |  |  |  | 6,201
Commercial [Member] | Construction [Member] |  |  |  |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  |  | 1,299 | 799 | 1,299 |  | 862 | 862
Provision charged to expense |  |  |  | 299 |  |  | 301 | 497
Losses charged off |  |  |  | (1) |  |  | (72) | (72)
Recoveries |  |  |  | 3 |  |  | 9 | 12
Ending balance |  |  |  | 1,100 |  |  | 1,100 | 1,299
Ending balance [Abstract] |  |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  | 99 |  |  | 99 | 99
Collectively evaluated for impairment |  |  |  | 1,001 |  |  | 1,001 | 1,200
Loans ending balance [Abstract] |  |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  | 2,974 |  |  | 2,974 | 3,010
Collectively evaluated for impairment |  |  |  | 90,560 |  |  | 90,560 | 101,799
Commercial [Member] | Real Estate Mortgage [Member] |  |  |  |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  |  | 14,025 | 15,098 | 14,025 |  | 14,531 | 14,531
Provision charged to expense |  |  |  | (742) |  |  | 79 | (137)
Losses charged off |  |  |  | (21) |  |  | (401) | (727)
Recoveries |  |  |  | 40 |  |  | 166 | 358
Ending balance |  |  |  | 14,375 |  |  | 14,375 | 14,025
Ending balance [Abstract] |  |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  | 398 |  |  | 398 | 227
Collectively evaluated for impairment |  |  |  | 13,977 |  |  | 13,977 | 13,798
Loans ending balance [Abstract] |  |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  | 39,986 |  |  | 39,986 | 41,379
Collectively evaluated for impairment |  |  |  | 1,134,778 |  |  | 1,134,778 | 1,128,596
Commercial [Member] | Equipment Lease Financing [Member] |  |  |  |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  |  | 4 | 7 | 4 |  | 12 | 12
Provision charged to expense |  |  |  | (2) |  |  | (7) | (8)
Losses charged off |  |  |  | 0 |  |  | 0 | 0
Recoveries |  |  |  | 0 |  |  | 0 | 0
Ending balance |  |  |  | 5 |  |  | 5 | 4
Ending balance [Abstract] |  |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  | 0 |  |  | 0 | 0
Collectively evaluated for impairment |  |  |  | 5 |  |  | 5 | 4
Loans ending balance [Abstract] |  |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  | 0 |  |  | 0 | 0
Collectively evaluated for impairment |  |  |  | 651 |  |  | 651 | 481
Commercial [Member] | Commercial Other [Member] |  |  |  |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  |  | 6,355 | 4,889 | 6,355 |  | 4,993 | 4,993
Provision charged to expense |  |  |  | 1,436 |  |  | 2,055 | 3,032
Losses charged off |  |  |  | (638) |  |  | (1,703) | (2,179)
Recoveries |  |  |  | 75 |  |  | 417 | 509
Ending balance |  |  |  | 5,762 |  |  | 5,762 | 6,355
Ending balance [Abstract] |  |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  | 175 |  |  | 175 | 886
Collectively evaluated for impairment |  |  |  | 5,587 |  |  | 5,587 | 5,469
Loans ending balance [Abstract] |  |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  | 11,037 |  |  | 11,037 | 11,073
Collectively evaluated for impairment |  |  |  | 377,495 |  |  | 377,495 | 378,610
Residential [Member] | Construction [Member] |  |  |  |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  |  | 372 | 358 | 372 |  | 512 | 512
Provision charged to expense |  |  |  | (28) |  |  | (181) | (40)
Losses charged off |  |  |  | 0 |  |  | (1) | (100)
Recoveries |  |  |  | 0 |  |  | 0 | 0
Ending balance |  |  |  | 330 |  |  | 330 | 372
Ending balance [Abstract] |  |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  | 0 |  |  | 0 | 0
Collectively evaluated for impairment |  |  |  | 330 |  |  | 330 | 372
Loans ending balance [Abstract] |  |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  | 0 |  |  | 0 | 0
Collectively evaluated for impairment |  |  |  | 62,859 |  |  | 62,859 | 63,350
Residential [Member] | Real Estate Mortgage [Member] |  |  |  |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  |  | 4,232 | 4,187 | 4,232 |  | 4,433 | 4,433
Provision charged to expense |  |  |  | 705 |  |  | 726 | 414
Losses charged off |  |  |  | (384) |  |  | (684) | (767)
Recoveries |  |  |  | 10 |  |  | 43 | 152
Ending balance |  |  |  | 4,518 |  |  | 4,518 | 4,232
Ending balance [Abstract] |  |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  | 0 |  |  | 0 | 0
Collectively evaluated for impairment |  |  |  | 4,518 |  |  | 4,518 | 4,232
Loans ending balance [Abstract] |  |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  | 2,318 |  |  | 2,318 | 2,309
Collectively evaluated for impairment |  |  |  | 720,314 |  |  | 720,314 | 730,694
Allocations to allowance for credit losses | 524 |  |  |  | 1,511 |  |  |
Residential [Member] | Home Equity Lines [Member] |  |  |  |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  |  | 897 | 933 | 897 |  | 841 | 841
Provision charged to expense |  |  |  | 32 |  |  | 181 | 172
Losses charged off |  |  |  | (40) |  |  | (99) | (139)
Recoveries |  |  |  | 2 |  |  | 4 | 23
Ending balance |  |  |  | 927 |  |  | 927 | 897
Ending balance [Abstract] |  |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  | 0 |  |  | 0 | 0
Collectively evaluated for impairment |  |  |  | 927 |  |  | 927 | 897
Loans ending balance [Abstract] |  |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  | 0 |  |  | 0 | 0
Collectively evaluated for impairment |  |  |  | 110,663 |  |  | 110,663 | 111,894
Allocations to allowance for credit losses | 56 |  |  |  | 88 |  |  |
Consumer [Member] | Consumer Direct [Member] |  |  |  |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  |  | 1,711 | 1,767 | 1,711 |  | 1,883 | 1,883
Provision charged to expense |  |  |  | 104 |  |  | 385 | 528
Losses charged off |  |  |  | (218) |  |  | (795) | (1,100)
Recoveries |  |  |  | 82 |  |  | 262 | 400
Ending balance |  |  |  | 1,735 |  |  | 1,735 | 1,711
Ending balance [Abstract] |  |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  | 0 |  |  | 0 | 0
Collectively evaluated for impairment |  |  |  | 1,735 |  |  | 1,735 | 1,711
Loans ending balance [Abstract] |  |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  | 0 |  |  | 0 | 0
Collectively evaluated for impairment |  |  |  | 149,500 |  |  | 149,500 | 148,051
Allocations to allowance for credit losses | 42 |  |  |  | 715 |  |  |
Consumer [Member] | Consumer Indirect [Member] |  |  |  |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  |  | 6,201 | 6,960 | 6,201 |  | 7,841 | 7,841
Provision charged to expense |  |  |  | (551) |  |  | (533) | 361
Losses charged off |  |  |  | (1,014) |  |  | (3,413) | (4,652)
Recoveries |  |  |  | 664 |  |  | 2,164 | 2,651
Ending balance |  |  |  | 6,059 |  |  | 6,059 | 6,201
Ending balance [Abstract] |  |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  | 0 |  |  | 0 | 0
Collectively evaluated for impairment |  |  |  | 6,059 |  |  | 6,059 | 6,201
Loans ending balance [Abstract] |  |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  | 0 |  |  | 0 | 0
Collectively evaluated for impairment |  |  |  | $ 511,650 |  |  | $ 511,650 | 527,418
Allocations to allowance for credit losses | $ 253 |  |  |  | 3,258 |  |  |
ASU 2016-13 [Member] |  |  |  |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  |  | 38,137 |  | 38,137 |  |  |
Ending balance |  |  |  |  |  |  |  | 38,137
ASU 2016-13 [Member] | Inherent Model Risk [Member] |  |  |  |  |  |  |  |
Loans ending balance [Abstract] |  |  |  |  |  |  |  |
Increase (decrease) in allowance for credit loss balance |  |  | (1,600) |  |  |  |  |
ASU 2016-13 [Member] | Real Estate Mortgage [Member] |  |  |  |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  |  | 7,319 |  | 7,319 |  |  |
Ending balance |  |  |  |  |  |  |  | 7,319
ASU 2016-13 [Member] | Consumer Direct [Member] |  |  |  |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  |  | 1,671 |  | 1,671 |  |  |
Ending balance |  |  |  |  |  |  |  | 1,671
ASU 2016-13 [Member] | Consumer Indirect [Member] |  |  |  |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  |  | $ 7,467 |  | $ 7,467 |  |  |
Ending balance |  |  |  |  |  |  |  | $ 7,467
[1] | Effective January 1, 2020, the allowance for loan and lease losses became the allowance for credit losses with the implementation of ASU 2016-13, commonly referred to as CECL.
[2] | Effective January 1, 2020, the provision for loan losses became the provision for credit losses with the implementation of ASU 2016-13, commonly referred to as CECL.

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- Definition Increase (decrease) in the amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + References No definition available. + Details
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- Definition Percentage of increase (decrease) in the amount of valuation allowance for financing receivables that are expected to be uncollectible during the period. + References No definition available. + Details
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- Definition Period of reasonable and supportable forecast used in determining allowance for credit losses, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but not limited to, weeks in a year or quarter. + References No definition available. + Details
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- Definition Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 + Details
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