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Fair Value Measurements - Additional Information (Detail)	12 Months Ended
	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%

X

- Definition

Loans measured for impairment based on fair value of underlying collateral estimated costs.

+ References

No definition available.

+ Details

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Namespace Prefix:	pfs_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- 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

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

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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