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Fair Value Measurements - Additional Information (Detail) | 12 Months Ended
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Dec. 31, 2017
Minimum [Member] |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |
Estimated costs | 5.00%
Maximum [Member] |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |
Estimated costs | 10.00%

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- Definition Loans measured for impairment based on fair value of underlying collateral estimated costs. + References No definition available. + Details
Name: | pfs_LoansMeasuredForImpairmentBasedOnFairValueOfUnderlyingCollateralEstimatedCosts
Namespace Prefix: | pfs_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- 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_FairValueInputsAssetsQuantitativeInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |