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Loans and Allowance for Credit Losses - Allowance for Credit Losses (Details) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2017 USD ($) quarter component | Sep. 30, 2016 USD ($) | Sep. 30, 2017 USD ($) quarter component | Sep. 30, 2016 USD ($) | Dec. 31, 2016 USD ($)
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Number of primary components | component | 2 |  | 2 |  |
Lookback period used in reserve analysis | quarter | 20 |  | 20 |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |  |
Allowance for credit losses, beginning balance | $ 9,297 | $ 9,872 | $ 9,326 | $ 9,610 |
Provision charged to operations | (900) | (1,000) | (1,150) | (5,850) |
Losses charged to allowance | (22) | (530) | (232) | (647) |
Recoveries | 541 | 957 | 972 | 6,186 |
Allowance for credit losses, ending balance | 8,916 | 9,299 | 8,916 | 9,299 |
Ending balance: individually evaluated for impairment | 56 |  | 56 |  | $ 307
Ending balance: collectively evaluated for impairment | 8,860 |  | 8,860 |  | 9,019
Commercial |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |  |
Allowance for credit losses, beginning balance | 2,196 | 2,972 | 2,180 | 3,562 |
Provision charged to operations | (532) | (963) | (776) | (5,787) |
Losses charged to allowance | (4) | (494) | (48) | (499) |
Recoveries | 514 | 803 | 818 | 5,042 |
Allowance for credit losses, ending balance | 2,174 | 2,318 | 2,174 | 2,318 |
Ending balance: individually evaluated for impairment | 1 |  | 1 |  | 3
Ending balance: collectively evaluated for impairment | 2,173 |  | 2,173 |  | 2,177
Real Estate |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |  |
Allowance for credit losses, beginning balance | 5,931 | 5,660 | 6,200 | 5,204 |
Provision charged to operations | (251) | 259 | (554) | (136) |
Losses charged to allowance | 0 | 0 | (22) | 0 |
Recoveries | 5 | 131 | 61 | 982 |
Allowance for credit losses, ending balance | 5,685 | 6,050 | 5,685 | 6,050 |
Ending balance: individually evaluated for impairment | 25 |  | 25 |  | 241
Ending balance: collectively evaluated for impairment | 5,660 |  | 5,660 |  | 5,959
Consumer |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |  |
Allowance for credit losses, beginning balance | 793 | 948 | 852 | 734 |
Provision charged to operations | (35) | (23) | (21) | 164 |
Losses charged to allowance | (18) | (36) | (162) | (148) |
Recoveries | 22 | 23 | 93 | 162 |
Allowance for credit losses, ending balance | 762 | 912 | 762 | 912 |
Ending balance: individually evaluated for impairment | 30 |  | 30 |  | 63
Ending balance: collectively evaluated for impairment | 732 |  | 732 |  | 789
Unallocated |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |  |
Allowance for credit losses, beginning balance | 377 | 292 | 94 | 110 |
Provision charged to operations | (82) | (273) | 201 | (91) |
Losses charged to allowance | 0 | 0 | 0 | 0 |
Recoveries | 0 | 0 | 0 | 0 |
Allowance for credit losses, ending balance | 295 | $ 19 | 295 | $ 19 |
Ending balance: individually evaluated for impairment | 0 |  | 0 |  | 0
Ending balance: collectively evaluated for impairment | $ 295 |  | $ 295 |  | $ 94

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- Definition Financing Receivable, Allowance for Credit Losses, Methodology Change, Number of Rolling Quarters Used in Analysis + References No definition available. + Details
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- Definition Loans and Leases Receivable, Allowance, Number of Components + References No definition available. + Details
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- Definition A valuation allowance for financing receivables that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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 The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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