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Loans, Allowance For Loan Losses And OREO (Narrative) (Details) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2017 USD ($) contract item | Sep. 30, 2016 contract | Sep. 30, 2017 USD ($) contract item | Sep. 30, 2016 contract | Dec. 31, 2016 USD ($) contract item | Dec. 31, 2015 USD ($)
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |
Other real estate owned | $ | $ 2,639 |  | $ 2,639 |  | $ 2,370 | $ 1,965
Loan modifications that would have been classified as TDRs | contract | 0 | 0 | 0 | 0 |  |
Loan modifications classified as TDRs | contract | 0 | 0 | 0 | 0 |  |
Outstanding commitments to disburse additional funds on TDR's | contract |  |  | 0 |  | 0 |
Consumer mortgage loan secured by residential real estate | $ | $ 0 |  | $ 0 |  | $ 294 |
Number of real estate properties held | item | 3 |  | 3 |  | 0 |
Residential Real Estate [Member] |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |
Other real estate owned | $ | $ 509 |  | $ 509 |  |  |

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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953676-111524 + Details
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- Definition Recorded investment of consumer mortgage loan receivables secured by residential real estate properties for which formal foreclosure proceedings are in process. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 35 -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL49126937-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Recorded Investment -URI http://asc.fasb.org/extlink&oid=65880944 + Details
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- Definition Carrying amount as of the balance sheet date of land and buildings obtained through foreclosure proceedings or defeasance in full or partial satisfaction of a debt arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 10 -Section S99 -Paragraph 6 -Subparagraph (SX 210.5-04(c)(Schedule III)) -URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5162-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=65884687&loc=d3e4437-111522 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 970 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-28) -URI http://asc.fasb.org/extlink&oid=6590653&loc=d3e638233-123024 + Details
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