CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 24,432	$ 27,882	$ 53,042	$ 55,781
Other comprehensive income:
Net unrealized gain on debt securities (net of tax expense of $710 and $1,344 in 2024 and $92 and $1,858 in 2023, respectively)	2,226	282	4,219	5,829
Accretion of unrealized loss on debt securities reclassified to held-to-maturity (net of tax expense of $40 and $82 in 2024 and $54 and $110 in 2023, respectively)	57	82	118	161
Unrealized loss on derivative hedges (net of tax benefit of $98 and $400 in 2024 and $506 and $375 in 2023, respectively)	(306)	(1,588)	(1,255)	(1,176)
Reclassification adjustment for losses included in net income (net of tax expense of $81 and $190 in 2024 and $61 and $262 in 2023, respectively)	253	191	595	820
Total other comprehensive income (loss), net of tax	2,230	(1,033)	3,677	5,634
Total comprehensive income	26,662	26,849	56,719	61,415
Less: comprehensive income attributable to non-controlling interest	59	85	2	101
Comprehensive income attributable to OceanFirst Financial Corp.	26,603	26,764	56,717	61,314
Less: Dividends on preferred shares	1,004	1,004	2,008	2,008
Total comprehensive income available to common stockholders	$ 25,599	$ 25,760	$ 54,709	$ 59,306