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Note 16 - Deferred Compensation Plans (Details) | 12 Months Ended
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Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($)
Officer [Member] |  |
Note 16 - Deferred Compensation Plans (Details) [Line Items] |  |
Deferred Compensation Arrangement with Individual, Maximum Contractual Term | 15 years |
Deferred Compensation Liability, Current and Noncurrent | $ 370,000 | $ 66,000
Deferred Compensation Arrangement with Individual, Compensation Expense | $ 8,000 | 8,000
Director [Member] |  |
Note 16 - Deferred Compensation Plans (Details) [Line Items] |  |
Deferred Compensation Arrangement with Individual, Maximum Contractual Term | 15 years |
Deferred Compensation Liability, Current and Noncurrent | $ 164,000 | 167,000
Deferred Compensation Arrangement with Individual, Compensation Expense | $ 19,000 | $ 19,000
Peoples Bancorp, Inc. [Member] |  |
Note 16 - Deferred Compensation Plans (Details) [Line Items] |  |
Deferred Compensation Arrangement with Individual, Maximum Contractual Term | 10 years |
Number of Key Employees | 3 |

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- Definition Maximum term of the deferred compensation arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 710 -SubTopic 10 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6409961&loc=d3e20487-108367 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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