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Regulatory Capital (Details) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
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Peoples Bank SB [Member] |  |
Regulatory Capital [Line Items] |  |
Tier 1 capital to risk-weighted assets Actual Amount (in dollars) | $ 86.3 | $ 81.2
Tier 1 capital to risk-weighted assets Minimum Required For Capital Adequacy Purposes (in dollars) | 41.2 | 37.9
Tier 1 capital to risk-weighted assets Minimum Required To Be Well Capitalized Under Prompt Corrective Action Regulations (in dollars) | 54.9 | 50.5
Total capital to risk-weighted assets Actual (in dollars) | 93.8 | 88.9
Total capital to risk-weighted assets Minimum Required For Capital Adequacy Purposes (in dollars) | 54.9 | 50.5
Total capital to risk-weighted assets Minimum Required To Be Well Capitalized Under Prompt Corrective Action Regulations (in dollars) | 68.7 | 63.1
Tier 1 capital to adjusted average assets Actual (in dollars) | 86.3 | 81.2
Tier 1 capital to adjusted average assets Minimum Required For Capital Adequacy Purposes (in dollars) | 36.7 | 35.9
Tier 1 capital to adjusted average assets Minimum Required To Be Well Capitalized Under Prompt Corrective Action Regulations (in dollars) | $ 45.8 | $ 44.9
Tier 1 capital to risk-weighted assets Actual Ratio | 12.60% | 12.90%
Tier 1 capital to risk-weighted assets Minimum Required For Capital Adequacy Purposes | 6.00% | 6.00%
Tier 1 capital to risk-weighted assets Minimum Required To Be Well Capitalized Under Prompt Corrective Action Regulations | 8.00% | 8.00%
Total capital to risk-weighted assets Actual | 13.70% | 14.10%
Total capital to risk-weighted assets Minimum Required For Capital Adequacy Purposes | 8.00% | 8.00%
Total capital to risk-weighted assets Minimum Required To Be Well Capitalized Under Prompt Corrective Action Regulations | 10.00% | 10.00%
Tier 1 capital to adjusted average assets Actual | 9.40% | 9.00%
Tier 1 capital to adjusted average assets Minimum Required For Capital Adequacy Purposes | 4.00% | 4.00%
Tier 1 capital to adjusted average assets Minimum Required To Be Well Capitalized Under Prompt Corrective Action Regulations | 5.00% | 5.00%
Parent Company [Member] |  |
Regulatory Capital [Line Items] |  |
Tier 1 capital to risk-weighted assets Actual Amount (in dollars) | $ 88.4 | $ 82.4
Tier 1 capital to risk-weighted assets Minimum Required For Capital Adequacy Purposes (in dollars) | 41.2 | 37.8
Tier 1 capital to risk-weighted assets Minimum Required To Be Well Capitalized Under Prompt Corrective Action Regulations (in dollars) |  |
Total capital to risk-weighted assets Actual (in dollars) | 96.0 | 90.1
Total capital to risk-weighted assets Minimum Required For Capital Adequacy Purposes (in dollars) | 55.0 | 50.4
Total capital to risk-weighted assets Minimum Required To Be Well Capitalized Under Prompt Corrective Action Regulations (in dollars) |  |
Tier 1 capital to adjusted average assets Actual (in dollars) | 88.4 | 82.4
Tier 1 capital to adjusted average assets Minimum Required For Capital Adequacy Purposes (in dollars) | 36.8 | 36.0
Tier 1 capital to adjusted average assets Minimum Required To Be Well Capitalized Under Prompt Corrective Action Regulations (in dollars) |  |
Tier 1 capital to risk-weighted assets Actual Ratio | 12.90% | 13.10%
Tier 1 capital to risk-weighted assets Minimum Required For Capital Adequacy Purposes | 6.00% | 6.00%
Tier 1 capital to risk-weighted assets Minimum Required To Be Well Capitalized Under Prompt Corrective Action Regulations |  |
Total capital to risk-weighted assets Actual | 14.00% | 14.30%
Total capital to risk-weighted assets Minimum Required For Capital Adequacy Purposes | 8.00% | 8.00%
Total capital to risk-weighted assets Minimum Required To Be Well Capitalized Under Prompt Corrective Action Regulations |  |
Tier 1 capital to adjusted average assets Actual | 9.60% | 9.20%
Tier 1 capital to adjusted average assets Minimum Required For Capital Adequacy Purposes | 4.00% | 4.00%
Tier 1 capital to adjusted average assets Minimum Required To Be Well Capitalized Under Prompt Corrective Action Regulations |  |
Common Stock [Member] | Peoples Bank SB [Member] |  |
Regulatory Capital [Line Items] |  |
Tier 1 capital to risk-weighted assets Actual Amount (in dollars) | $ 86.3 | $ 81.2
Tier 1 capital to risk-weighted assets Minimum Required For Capital Adequacy Purposes (in dollars) | 30.9 | 28.4
Tier 1 capital to risk-weighted assets Minimum Required To Be Well Capitalized Under Prompt Corrective Action Regulations (in dollars) | $ 44.6 | $ 41.0
Tier 1 capital to risk-weighted assets Actual Ratio | 12.60% | 12.90%
Tier 1 capital to risk-weighted assets Minimum Required For Capital Adequacy Purposes | 4.50% | 4.50%
Tier 1 capital to risk-weighted assets Minimum Required To Be Well Capitalized Under Prompt Corrective Action Regulations | 6.50% | 6.50%
Common Stock [Member] | Parent Company [Member] |  |
Regulatory Capital [Line Items] |  |
Tier 1 capital to risk-weighted assets Actual Amount (in dollars) | $ 88.4 | $ 82.4
Tier 1 capital to risk-weighted assets Minimum Required For Capital Adequacy Purposes (in dollars) | 30.9 | 28.3
Tier 1 capital to risk-weighted assets Minimum Required To Be Well Capitalized Under Prompt Corrective Action Regulations (in dollars) |  |
Tier 1 capital to risk-weighted assets Actual Ratio | 12.90% | 13.10%
Tier 1 capital to risk-weighted assets Minimum Required For Capital Adequacy Purposes | 4.50% | 4.50%
Tier 1 capital to risk-weighted assets Minimum Required To Be Well Capitalized Under Prompt Corrective Action Regulations |  |

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- Definition The minimum amount of Total Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 + Details
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- Definition The minimum Total risk based capital ratio (total capital divided by risk weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958570-112826 + Details
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- Definition The amount of Total Capital required to be categorized as well as capitalized under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 + Details
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- Definition Total Capital divided by risk weighted assets as defined in the regulations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 + Details
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- Definition Tier 1 Leverage Capital as defined in the regulations. Also called Core Capital. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 + Details
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- Definition The minimum amount of Tier 1 Leverage Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 + Details
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- Definition The minimum amount of Tier 1 Leverage Capital for capital adequacy purposes divided by average assets as defined in the regulations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958570-112826 + Details
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- Definition The amount of Tier 1 Leverage Capital required to be categorized as well capitalized under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 + Details
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- Definition Tier 1 Risk Based Capital as defined in the regulations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 + Details
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- Definition The minimum Tier One Capital Ratio (Tier one capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958570-112826 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 + Details
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- Definition The Tier 1 capital ratio (Tier 1 capital divided by risk weighted assets) required to be categorized as "well capitalized" under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 + Details
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