Basis of Presentation	3 Months Ended
Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited consolidated financial statements include the accounts of OceanFirst Financial Corp. (the “Company”) and its wholly-owned subsidiaries, OceanFirst Bank N.A. (the “Bank”) and OceanFirst Risk Management, Inc., and the Bank’s wholly-owned subsidiaries, OceanFirst REIT Holdings, Inc., and its wholly-owned subsidiary OceanFirst Management Corp., and its wholly-owned subsidiary OceanFirst Realty Corp., OceanFirst Services, LLC and its wholly-owned subsidiary OFB Reinsurance, Ltd., 975 Holdings, LLC, Hooper Holdings, LLC., TRREO Holdings LLC, Casaba Real Estate Holdings Corporation, Cohensey Bridge, L.L.C., and Prosperis Financial, LLC. All significant intercompany accounts and transactions have been eliminated in consolidation. Certain amounts previously reported have been reclassified to conform to the current year’s presentation. The interim consolidated financial statements reflect all normal and recurring adjustments which are, in the opinion of management, considered necessary for a fair presentation of the financial condition and results of operations for the periods presented. The results of operations for the three months ended March 31, 2018 are not necessarily indicative of the results of operations that may be expected for all of 2018. In preparing the consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the statements of financial condition and the results of operations for the period. Actual results could differ from these estimates. Certain information and note disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles have been condensed or omitted, pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”). These unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017.

Basis of Presentation

The accompanying unaudited consolidated financial statements include the accounts of OceanFirst Financial Corp. (the “Company”) and its wholly-owned subsidiaries, OceanFirst Bank N.A. (the “Bank”) and OceanFirst Risk Management, Inc., and the Bank’s wholly-owned subsidiaries, OceanFirst REIT Holdings, Inc., and its wholly-owned subsidiary OceanFirst Management Corp., and its wholly-owned subsidiary OceanFirst Realty Corp., OceanFirst Services, LLC and its wholly-owned subsidiary OFB Reinsurance, Ltd., 975 Holdings, LLC, Hooper Holdings, LLC., TRREO Holdings LLC, Casaba Real Estate Holdings Corporation, Cohensey Bridge, L.L.C., and Prosperis Financial, LLC. All significant intercompany accounts and transactions have been eliminated in consolidation.

Certain amounts previously reported have been reclassified to conform to the current year’s presentation.

The interim consolidated financial statements reflect all normal and recurring adjustments which are, in the opinion of management, considered necessary for a fair presentation of the financial condition and results of operations for the periods presented. The results of operations for the three months ended March 31, 2018 are not necessarily indicative of the results of operations that may be expected for all of 2018. In preparing the consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the statements of financial condition and the results of operations for the period. Actual results could differ from these estimates.

Certain information and note disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles have been condensed or omitted, pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”).

These unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017.