OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Principles of Consolidation, Nature of Business, Loan Charge-off Policies, and Loans Held for Sale (Details)	12 Months Ended
Dec. 31, 2021 segment office	Oct. 01, 2021
Noncontrolling Interest [Line Items]
Number of offices (in offices) \| office	25
Number of reportable segments (in segments) \| segment	1
Number of days loan is past due unless both well secured and in process of collection	180 days
United Insurance Solutions, LLC
Noncontrolling Interest [Line Items]
Outstanding minority interest percentage		20.00%

Represents the number of days loan is past due unless both well secured and in the process of collection.

No definition available.

Name:	pwod_FinancingReceivableRecordedInvestmentNumberOfDaysLoanIsPastDue
Namespace Prefix:	pwod_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of Offices

+ References

No definition available.

+ Details

Name:	pwod_NumberofOffices
Namespace Prefix:	pwod_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of voting equity interests acquired at the acquisition date in the business combination.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

+ Details

Name:	us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_MinorityInterestLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8672-108599

+ Details

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_BusinessAcquisitionAxis=pwod_UnitedInsuranceSolutionsLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: