CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 28,610	$ 27,899
Other comprehensive income:
Net unrealized gain on debt securities (net of tax expense of $634 in 2024 and $1,766 in 2023)	1,993	5,547
Accretion of unrealized loss on debt securities reclassified to held-to-maturity (net of tax expense of $42 in 2024 and $56 in 2023)	61	79
Unrealized (loss) gain on derivative hedges (net of tax benefit of $302 in 2024 and tax expense of $131 in 2023)	(949)	412
Reclassification adjustment for losses included in net income (net of tax expense of $109 in 2024 and $201 in 2023)	342	629
Total other comprehensive income, net of tax	1,447	6,667
Total comprehensive income	30,057	34,566
Less: comprehensive (loss) income attributable to non-controlling interest	(57)	16
Comprehensive income attributable to OceanFirst Financial Corp.	30,114	34,550
Less: Dividends on preferred shares	1,004	1,004
Total comprehensive income available to common stockholders	$ 29,110	$ 33,546