| Document and Entity Information | Oct. 07, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K/A |
| Amendment Flag | true |
| Amendment Description | This Amendment No. 1 to Current Report on Form 8-K/A is being filed with the Securities and Exchange Commission (the “Commission”) solely to amend and supplement Item 9.01 of the Current Report on Form 8-K filed by Provident Financial Services, Inc. (“Provident”) on August 3, 2020, regarding the completion of its acquisition of SB One Bancorp (“SB One”) on July 31, 2020, pursuant to the Agreement and Plan of Merger, dated as of March 11, 2020, between Provident and SB One. |
| Document Period End Date | Oct. 7, 2020 |
| Entity Registrant Name | PROVIDENT FINANCIAL SERVICES, INC. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-31566 |
| Entity Tax Identification Number | 42-1547151 |
| Entity Address, Address Line One | 239 Washington Street |
| Entity Address, City or Town | Jersey City |
| Entity Address, State or Province | NJ |
| Entity Address, Postal Zip Code | 07302 |
| City Area Code | 732 |
| Local Phone Number | 590-9200 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001178970 |
| Title of 12(b) Security | Common stock, par value $0.01 per share |
| Trading Symbol | PFS |
| Security Exchange Name | NYSE |
