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Loans - Allowance for Loan Losses (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2019 | Mar. 31, 2018
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |
Allowance for loan losses, Beginning Balance | $ 19,704 | $ 19,693
Charge-offs | (818) | (726)
Recoveries | 154 | 158
Provision (benefit) for loan losses | 1,306 | 1,631
Allowance for loan losses, Ending Balance | 20,346 | 20,756
Commercial, industrial, and agricultural |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |
Allowance for loan losses, Beginning Balance | 7,341 | 6,160
Charge-offs | 0 | (31)
Recoveries | 4 | 68
Provision (benefit) for loan losses | 442 | 85
Allowance for loan losses, Ending Balance | 7,787 | 6,282
Commercial Mortgages |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |
Allowance for loan losses, Beginning Balance | 7,490 | 9,007
Charge-offs | (17) | 0
Recoveries | 0 | 0
Provision (benefit) for loan losses | 1,373 | 1,013
Allowance for loan losses, Ending Balance | 8,846 | 10,020
Residential real estate |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |
Allowance for loan losses, Beginning Balance | 2,156 | 2,033
Charge-offs | (98) | 0
Recoveries | 65 | 3
Provision (benefit) for loan losses | (740) | 16
Allowance for loan losses, Ending Balance | 1,383 | 2,052
Consumer |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |
Allowance for loan losses, Beginning Balance | 2,377 | 2,179
Charge-offs | (549) | (590)
Recoveries | 46 | 49
Provision (benefit) for loan losses | 166 | 427
Allowance for loan losses, Ending Balance | 2,040 | 2,065
Credit cards |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |
Allowance for loan losses, Beginning Balance | 103 | 120
Charge-offs | (26) | (19)
Recoveries | 5 | 7
Provision (benefit) for loan losses | 23 | 15
Allowance for loan losses, Ending Balance | 105 | 123
Overdrafts |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |
Allowance for loan losses, Beginning Balance | 237 | 194
Charge-offs | (128) | (86)
Recoveries | 34 | 31
Provision (benefit) for loan losses | 42 | 75
Allowance for loan losses, Ending Balance | $ 185 | $ 214

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- Definition A valuation allowance for financing receivables that are expected to be uncollectible. + 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)(1) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition Amount of recovery of financing receivables doubtful of collection that were previously charged off. + 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=84173941&loc=SL6953423-111524 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of direct write-downs of financing receivables charged against the allowance. + 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)(3) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition Amount of expense related to loss from loan transactions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI http://asc.fasb.org/extlink&oid=114873765&loc=SL114874048-224260 + Details
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