CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 25,186	$ 20,532	$ 78,228	$ 76,313
Other comprehensive income:
Net unrealized gain on debt securities (net of tax expense of $1,225 and $2,569 in 2024 and $572 and $2,430 in 2023, respectively)	3,847	1,797	8,066	7,626
Accretion of unrealized loss on debt securities reclassified to held-to-maturity (net of tax expense of $43 and $125 in 2024 and $66 and $176 in 2023, respectively)	62	116	180	277
Unrealized gain (loss) on derivative hedges (net of tax expense of $267 and tax benefit of $133 in 2024 and tax benefit of $198 and $573 in 2023, respectively)	837	(622)	(418)	(1,798)
Reclassification adjustment for losses included in net income (net of tax expense of $80 and $270 in 2024 and $78 and $340 in 2023, respectively)	254	246	849	1,066
Total other comprehensive income, net of tax	5,000	1,537	8,677	7,171
Total comprehensive income	30,186	22,069	86,905	83,484
Less: comprehensive income (loss) attributable to non-controlling interest	70	(135)	72	(34)
Comprehensive income attributable to OceanFirst Financial Corp.	30,116	22,204	86,833	83,518
Less: Dividends on preferred shares	1,004	1,004	3,012	3,012
Total comprehensive income available to common stockholders	$ 29,112	$ 21,200	$ 83,821	$ 80,506