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EMPLOYEE BENEFIT PLANS (Details 2) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
age
Dec. 31, 2013
Dec. 31, 2012
Plan's asset allocations by asset category      
Weighted-average asset allocations by asset category (as a percent) 100.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations 100.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations  
Assets at fair value $ 13,906us-gaap_DefinedBenefitPlanFairValueOfPlanAssets $ 14,258us-gaap_DefinedBenefitPlanFairValueOfPlanAssets $ 12,078us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
Future benefit payments that reflect expected future service, as appropriate, expected to be paid:      
2015 715us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths    
2016 728us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo    
2017 752us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree    
2018 778us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour    
2019 838us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive    
Thereafter 4,571us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter    
Total 8,382pwod_DefinedBenefitPlanExpectedFutureBenefitPaymentsTotal    
401(k) Savings Plan      
Vesting period regarding employer contribution 5 years    
Contribution expense 171us-gaap_DefinedContributionPlanCostRecognized 132us-gaap_DefinedContributionPlanCostRecognized 118us-gaap_DefinedContributionPlanCostRecognized
Deferred Compensation Plan      
Period for which the Company will make payments under the Deferred Compensation Plan 10 years    
Threshold age of employees under the plan for company to make payments 65pwod_DeferredCompensationArrangementWithIndividualThresholdAgeOfEmployeeToReceivePayments    
Expenses incurred related to the plan 235us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense 169us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense 84us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense
Benefits paid under the plan 88us-gaap_DeferredCompensationArrangementWithIndividualDistributionsPaid 57us-gaap_DeferredCompensationArrangementWithIndividualDistributionsPaid 140us-gaap_DeferredCompensationArrangementWithIndividualDistributionsPaid
Minimum      
Expected minimum contribution to Pension Plan in next fiscal year      
Expected contribution to Pension Plan in 2013 600us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInNextFiscalYear
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
   
Level 1      
Plan's asset allocations by asset category      
Assets at fair value 13,906us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
14,258us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
 
Cash      
Plan's asset allocations by asset category      
Weighted-average asset allocations by asset category (as a percent) 11.54%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_CashMember
1.48%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_CashMember
 
Target allocation (as a percent) 2.50%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_CashMember
   
Total equity securities      
Plan's asset allocations by asset category      
Weighted-average asset allocations by asset category (as a percent) 76.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_EquitySecuritiesMember
78.74%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_EquitySecuritiesMember
 
Target allocation (as a percent) 75.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_EquitySecuritiesMember
   
Cash and cash equivalents      
Plan's asset allocations by asset category      
Assets at fair value 1,606us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_CashAndCashEquivalentsMember
211us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_CashAndCashEquivalentsMember
 
Cash and cash equivalents | Level 1      
Plan's asset allocations by asset category      
Assets at fair value 1,606us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_CashAndCashEquivalentsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
211us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_CashAndCashEquivalentsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
 
Mutual funds - taxable fixed income      
Plan's asset allocations by asset category      
Weighted-average asset allocations by asset category (as a percent) 12.46%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_FixedIncomeSecuritiesMember
19.78%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_FixedIncomeSecuritiesMember
 
Target allocation (as a percent) 22.50%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_FixedIncomeSecuritiesMember
   
Assets at fair value 1,732us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_FixedIncomeSecuritiesMember
2,820us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_FixedIncomeSecuritiesMember
 
Mutual funds - taxable fixed income | Level 1      
Plan's asset allocations by asset category      
Assets at fair value 1,732us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_FixedIncomeSecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
2,820us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_FixedIncomeSecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
 
Mutual funds - domestic equity      
Plan's asset allocations by asset category      
Assets at fair value 8,372us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_DomesticCorporateDebtSecuritiesMember
7,471us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_DomesticCorporateDebtSecuritiesMember
 
Mutual funds - domestic equity | Level 1      
Plan's asset allocations by asset category      
Assets at fair value 8,372us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_DomesticCorporateDebtSecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
7,471us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_DomesticCorporateDebtSecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
 
Mutual funds - international equity      
Plan's asset allocations by asset category      
Assets at fair value 2,196us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_ForeignCorporateDebtSecuritiesMember
3,756us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_ForeignCorporateDebtSecuritiesMember
 
Mutual funds - international equity | Level 1      
Plan's asset allocations by asset category      
Assets at fair value $ 2,196us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_ForeignCorporateDebtSecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
$ 3,756us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_ForeignCorporateDebtSecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member