CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 27,899	$ 25,759
Other comprehensive income:
Net unrealized gain (loss) on debt securities (net of tax expense of $1,766 in 2023 and tax benefit of $3,928 in 2022)	5,547	(12,372)
Accretion of unrealized loss on debt securities reclassified to held-to-maturity (net of tax expense of $56 in 2023 and $65 in 2022)	79	89
Unrealized gain on derivative hedges (net of tax expense of $131 in 2023)	412	0
Reclassification adjustment for losses included in net income (net of tax expense of $201 in 2023 and benefit of $21 in 2022)	629	(66)
Total other comprehensive income (loss), net of tax	6,667	(12,349)
Total comprehensive income	34,566	13,410
Less: comprehensive income attributable to non-controlling interest	16	0
Comprehensive income attributable to OceanFirst Financial Corp.	34,550	13,410
Less: Dividends on preferred shares	1,004	1,004
Total comprehensive income available to common stockholders	$ 33,546	$ 12,406