Parent-Only Financial Information - Condensed Statements of Financial Condition (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Assets
Cash and due from banks	$ 43,946	$ 36,117	$ 33,958	$ 62,544
Investment securities	29,902	19,804
Other assets	10,900	11,883
Total assets	2,593,068	2,356,714
Liabilities and Stockholders' Equity
Borrowings	422,757	400,550
Other liabilities	8,066	11,447
Stockholder's equity	238,446	218,259	$ 214,350	$ 219,792
Total liabilities and stockholders' equity	2,593,068	2,356,714
OceanFirst Financial Corp. [Member]
Assets
Cash and due from banks	7	7
Advances to subsidiary Bank	16,196	22,776
Investment securities	1,000
ESOP loan receivable	3,503	3,707
Investment in subsidiary Bank	239,486	219,221
Other assets	866	229
Total assets	261,058	245,940
Liabilities and Stockholders' Equity
Borrowings	22,500	27,500
Other liabilities	112	181
Stockholder's equity	238,446	218,259
Total liabilities and stockholders' equity	$ 261,058	$ 245,940