| Cover | 12 Months Ended |
| Dec. 31, 2022 | |
| Document Information [Line Items] | |
| Document Type | DEF 14A |
| Amendment Flag | false |
| Entity Information [Line Items] | |
| Entity Registrant Name | OceanFirst Financial Corp. |
| Entity Central Index Key | 0001004702 |
| Pay vs Performance Disclosure pure in Thousands | 12 Months Ended | 36 Months Ended | |||
| Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2022 | ||
| Pay vs Performance Disclosure [Table] | |||||
| Pay vs Performance [Table Text Block] | Pay versus Performance The following table presents information regarding compensation actually paid to the Company’s CEO and Non-CEO NEOs and certain Company performance metrics. The amount of compensation actually paid is calculated in accordance with Item 402(v) of Regulation S-K which requires disclosure of the relationship between executive pay versus the Company’s financial performance. However, compensation actually paid does not reflect the actual amount earned by or paid to our NEOs during a covered year. Summary (1) Compensation (2) Average (1) Average (2) ($) Value of Initial Fixed $100 Net Income Core (4) Total Peer Group (3) 2022 3,061,528 2,297,791 1,221,449 904,520 99.15 93.07 142,587 137,961 2021 3,161,351 3,903,652 1,420,768 1,835,010 123.13 136.64 106,060 111,165 2020 2,962,985 2,250,728 1,207,732 897,371 75.89 91.29 61,212 72,186 (1) Mr. Maher Barrett Fitzpatrick Lebel Tsimbinos Ms. Estep Fitzpatrick Lebel Tsimbinos Ms. Estep Fitzpatrick Lebel Tsimbinos Grace Vallacchi (2) Following is a reconciliation of Total Compensation in the Summary Compensation Table to Compensation Actually Paid for the CEO and Non-CEO NEOs. There were no valuation assumptions that differ materially from those utilized and disclosed at the time of grant. 2022 2021 2020 Compensation Average Compensation Average Compensation Average Total Compensation in the Summary Compensation Table 3,061,528 1,221,449 3,161,351 1,420,768 2,962,985 1,207,732 Deduct Amounts Reported in Summary Compensation Table: Equity Awards (1,079,992) (453,993) (1,200,018) (620,017) (1,249,977) (575,017) Change in Defined Benefit Pension Value — — — — — — Other Additions (Deductions) to Arrive at Compensation Actually Paid: Value of awards granted in the covered year that are outstanding and unvested at year end 1,033,451 438,687 1,256,622 646,581 1,652,111 846,586 Change in value of awards granted in a prior year that are outstanding and unvested at year end (576,072) (222,750) 504,636 287,807 (904,625) (3678,270) Value of awards granted in a prior year that vest in the covered year (141,124) (78,874) 181,061 99,871 (209,767) (203,660) Fair value of awards forfeited in current fiscal year determined at prior fiscal year — — — — — — Aggregate of Pension Service Cost and Prior Service Cost — — — — — — Dividend Paid on unvested shares/share units ( 1) — — — — — — Compensation Actually Paid 2,297,791 904,520 3,903,652 1,835,010 2,250,728 897,371 (1) Dividends are paid upon shares vesting and are reflected in the “Total Compensation in the Summary Compensation Table” figure. (3) Peer group is the KBW Regional Banking Index used for purposes of Item 201(e) of Regulation S-K. (4) Core earnings | ||||
| Company Selected Measure Name | [1] | CoreEarnings | |||
| Named Executive Officers, Footnote [Text Block] | (1) Mr. Maher Barrett Fitzpatrick Lebel Tsimbinos Ms. Estep Fitzpatrick Lebel Tsimbinos Ms. Estep Fitzpatrick Lebel Tsimbinos Grace Vallacchi | ||||
| Peer Group Issuers, Footnote [Text Block] | (3) Peer group is the KBW Regional Banking Index used for purposes of Item 201(e) of Regulation S-K. | ||||
| PEO Total Compensation Amount | [2] | $ 3,061,528 | $ 3,161,351 | $ 2,962,985 | |
| PEO Actually Paid Compensation Amount | [3] | 2,297,791 | 3,903,652 | 2,250,728 | |
| Adjustment To PEO Compensation, Footnote [Text Block] | (2) Following is a reconciliation of Total Compensation in the Summary Compensation Table to Compensation Actually Paid for the CEO and Non-CEO NEOs. There were no valuation assumptions that differ materially from those utilized and disclosed at the time of grant. 2022 2021 2020 Compensation Average Compensation Average Compensation Average Total Compensation in the Summary Compensation Table 3,061,528 1,221,449 3,161,351 1,420,768 2,962,985 1,207,732 Deduct Amounts Reported in Summary Compensation Table: Equity Awards (1,079,992) (453,993) (1,200,018) (620,017) (1,249,977) (575,017) Change in Defined Benefit Pension Value — — — — — — Other Additions (Deductions) to Arrive at Compensation Actually Paid: Value of awards granted in the covered year that are outstanding and unvested at year end 1,033,451 438,687 1,256,622 646,581 1,652,111 846,586 Change in value of awards granted in a prior year that are outstanding and unvested at year end (576,072) (222,750) 504,636 287,807 (904,625) (3678,270) Value of awards granted in a prior year that vest in the covered year (141,124) (78,874) 181,061 99,871 (209,767) (203,660) Fair value of awards forfeited in current fiscal year determined at prior fiscal year — — — — — — Aggregate of Pension Service Cost and Prior Service Cost — — — — — — Dividend Paid on unvested shares/share units ( 1) — — — — — — Compensation Actually Paid 2,297,791 904,520 3,903,652 1,835,010 2,250,728 897,371 (1) Dividends are paid upon shares vesting and are reflected in the “Total Compensation in the Summary Compensation Table” figure. | ||||
| Non-PEO NEO Average Total Compensation Amount | [2] | 1,221,449 | 1,420,768 | 1,207,732 | |
| Non-PEO NEO Average Compensation Actually Paid Amount | [3] | $ 904,520 | 1,835,010 | 897,371 | |
| Adjustment to Non-PEO NEO Compensation Footnote [Text Block] | (2) Following is a reconciliation of Total Compensation in the Summary Compensation Table to Compensation Actually Paid for the CEO and Non-CEO NEOs. There were no valuation assumptions that differ materially from those utilized and disclosed at the time of grant. 2022 2021 2020 Compensation Average Compensation Average Compensation Average Total Compensation in the Summary Compensation Table 3,061,528 1,221,449 3,161,351 1,420,768 2,962,985 1,207,732 Deduct Amounts Reported in Summary Compensation Table: Equity Awards (1,079,992) (453,993) (1,200,018) (620,017) (1,249,977) (575,017) Change in Defined Benefit Pension Value — — — — — — Other Additions (Deductions) to Arrive at Compensation Actually Paid: Value of awards granted in the covered year that are outstanding and unvested at year end 1,033,451 438,687 1,256,622 646,581 1,652,111 846,586 Change in value of awards granted in a prior year that are outstanding and unvested at year end (576,072) (222,750) 504,636 287,807 (904,625) (3678,270) Value of awards granted in a prior year that vest in the covered year (141,124) (78,874) 181,061 99,871 (209,767) (203,660) Fair value of awards forfeited in current fiscal year determined at prior fiscal year — — — — — — Aggregate of Pension Service Cost and Prior Service Cost — — — — — — Dividend Paid on unvested shares/share units ( 1) — — — — — — Compensation Actually Paid 2,297,791 904,520 3,903,652 1,835,010 2,250,728 897,371 (1) Dividends are paid upon shares vesting and are reflected in the “Total Compensation in the Summary Compensation Table” figure. | ||||
| Compensation Actually Paid vs. Total Shareholder Return [Text Block] | Description of the Relationship Between Compensation Actually Paid to our Named Executive Officers and Company Performance Compensation Actually Paid Versus Financial Performance Measures. The following presents executive compensation actually paid versus the Company’s cumulative total shareholder return, net income and Core Earnings: | ||||
| Compensation Actually Paid vs. Net Income [Text Block] | |||||
| Compensation Actually Paid vs. Company Selected Measure [Text Block] | |||||
| Total Shareholder Return Vs Peer Group [Text Block] | The following presents cumulative total shareholder return for OceanFirst Bank versus the KBW Regional Banking Index peer group: | ||||
| Tabular List [Table Text Block] | Company’s Most Important Financial Performance Measures The following were the most important financial performance measures used to link the NEOs’ compensation actually paid to the Company’s financial performance for the most recently completed fiscal year: Core Earnings Core ROA Core Efficiency Ratio TSR | ||||
| Total Shareholder Return Amount | $ 99.15 | 123.13 | 75.89 | ||
| Peer Group Total Shareholder Return Amount | [4] | 93.07 | 136.64 | 91.29 | |
| Net Income (Loss) | $ 142,587,000 | $ 106,060,000 | $ 61,212,000 | ||
| Company Selected Measure Amount | [1] | 137,961 | 111,165 | 72,186 | |
| PEO Name | Mr. Maher | ||||
| Measure [Axis]: 1 | |||||
| Pay vs Performance Disclosure [Table] | |||||
| Measure Name | Core Earnings | ||||
| Measure [Axis]: 2 | |||||
| Pay vs Performance Disclosure [Table] | |||||
| Measure Name | Core ROA | ||||
| Measure [Axis]: 3 | |||||
| Pay vs Performance Disclosure [Table] | |||||
| Measure Name | Core Efficiency Ratio | ||||
| Measure [Axis]: 4 | |||||
| Pay vs Performance Disclosure [Table] | |||||
| Measure Name | TSR | ||||
| PEO [Member] | Total Equity Awards Adjustments [Member] | |||||
| Pay vs Performance Disclosure [Table] | |||||
| Adjustment to Compensation Amount | $ (1,079,992) | $ (1,200,018) | $ (1,249,977) | ||
| PEO [Member] | Value of awards granted in the covered year that are outstanding and unvested at year end [Member] | |||||
| Pay vs Performance Disclosure [Table] | |||||
| Adjustment to Compensation Amount | 1,033,451 | 1,256,622 | 1,652,111 | ||
| PEO [Member] | Change in value of awards granted in a prior year that are outstanding and unvested at year end [Member] | |||||
| Pay vs Performance Disclosure [Table] | |||||
| Adjustment to Compensation Amount | (576,072) | 504,636 | (904,625) | ||
| PEO [Member] | Value of awards granted in a prior year that vest in the covered year [Member] | |||||
| Pay vs Performance Disclosure [Table] | |||||
| Adjustment to Compensation Amount | (141,124) | 181,061 | (209,767) | ||
| Non-PEO NEO [Member] | Total Equity Awards Adjustments [Member] | |||||
| Pay vs Performance Disclosure [Table] | |||||
| Adjustment to Compensation Amount | (453,993) | (620,017) | (575,017) | ||
| Non-PEO NEO [Member] | Value of awards granted in the covered year that are outstanding and unvested at year end [Member] | |||||
| Pay vs Performance Disclosure [Table] | |||||
| Adjustment to Compensation Amount | 438,687 | 646,581 | 846,586 | ||
| Non-PEO NEO [Member] | Change in value of awards granted in a prior year that are outstanding and unvested at year end [Member] | |||||
| Pay vs Performance Disclosure [Table] | |||||
| Adjustment to Compensation Amount | (222,750) | 287,807 | 270 | ||
| Non-PEO NEO [Member] | Value of awards granted in a prior year that vest in the covered year [Member] | |||||
| Pay vs Performance Disclosure [Table] | |||||
| Adjustment to Compensation Amount | $ (78,874) | $ 99,871 | $ (203,660) | ||
| [1] (4) Core earnings (1) Mr. Maher Barrett Fitzpatrick Lebel Tsimbinos Ms. Estep Fitzpatrick Lebel Tsimbinos Ms. Estep Fitzpatrick Lebel Tsimbinos Grace Vallacchi (2) Following is a reconciliation of Total Compensation in the Summary Compensation Table to Compensation Actually Paid for the CEO and Non-CEO NEOs. There were no valuation assumptions that differ materially from those utilized and disclosed at the time of grant. 2022 2021 2020 Compensation Average Compensation Average Compensation Average Total Compensation in the Summary Compensation Table 3,061,528 1,221,449 3,161,351 1,420,768 2,962,985 1,207,732 Deduct Amounts Reported in Summary Compensation Table: Equity Awards (1,079,992) (453,993) (1,200,018) (620,017) (1,249,977) (575,017) Change in Defined Benefit Pension Value — — — — — — Other Additions (Deductions) to Arrive at Compensation Actually Paid: Value of awards granted in the covered year that are outstanding and unvested at year end 1,033,451 438,687 1,256,622 646,581 1,652,111 846,586 Change in value of awards granted in a prior year that are outstanding and unvested at year end (576,072) (222,750) 504,636 287,807 (904,625) (3678,270) Value of awards granted in a prior year that vest in the covered year (141,124) (78,874) 181,061 99,871 (209,767) (203,660) Fair value of awards forfeited in current fiscal year determined at prior fiscal year — — — — — — Aggregate of Pension Service Cost and Prior Service Cost — — — — — — Dividend Paid on unvested shares/share units ( 1) — — — — — — Compensation Actually Paid 2,297,791 904,520 3,903,652 1,835,010 2,250,728 897,371 (1) Dividends are paid upon shares vesting and are reflected in the “Total Compensation in the Summary Compensation Table” figure. (3) Peer group is the KBW Regional Banking Index used for purposes of Item 201(e) of Regulation S-K. | |||||
