CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 38,804	$ 24,167	$ 94,046	$ 87,419
Other comprehensive loss:
Net unrealized loss on debt securities (net of tax benefit of $3,023 and $11,411 in 2022 and tax benefit of $232 and $446 in 2021)	(9,490)	(855)	(35,858)	(1,658)
Accretion of unrealized loss on debt securities reclassified to held-to-maturity (net of tax expense of $60 and $186 in 2022 and tax expense of $66 and $209 in 2021)	87	95	265	303
Reclassification adjustment for gains included in net income (net of tax benefit of $26 in 2022)	0	0	(82)	0
Total other comprehensive loss, net of tax	(9,403)	(760)	(35,675)	(1,355)
Total comprehensive income	29,401	23,407	58,371	86,064
Less: comprehensive income attributable to non-controlling interest	193	0	715	0
Comprehensive income attributable to OceanFirst Financial Corp.	29,208	23,407	57,656	86,064
Less: Dividends on preferred shares	1,004	1,004	3,012	3,012
Comprehensive income available to common stockholders	$ 28,204	$ 22,403	$ 54,644	$ 83,052