CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 29,483	$ 30,555	$ 55,242	$ 63,252
Other comprehensive loss:
Net unrealized loss on debt securities (net of tax benefit of $4,460 and $8,388 in 2022 and tax benefit of $102 and $214 in 2021, respectively)	(13,996)	(387)	(26,368)	(803)
Accretion of unrealized loss on debt securities reclassified to held-to-maturity (net of tax expense of $61 and $126 in 2022 and tax expense of $70 and $143 in 2021)	89	101	178	208
Reclassification adjustment for gains included in net income (net of tax benefit of $5 and $26 in 2022)	(16)	0	(82)	0
Total other comprehensive loss, net of tax	(13,923)	(286)	(26,272)	(595)
Total comprehensive income	15,560	30,269	28,970	62,657
Less: comprehensive income attributable to non-controlling interest	522	0	522	0
Comprehensive income attributable to OceanFirst Financial Corp.	15,038	30,269	28,448	62,657
Less: Dividends on preferred shares	1,004	1,004	2,008	2,008
Comprehensive income available to common stockholders	$ 14,034	$ 29,265	$ 26,440	$ 60,649