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Parent-Only Financial Information - Condensed Statements of Cash Flows (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Cash flows from operating activities: |  |  |
Net income | $ 110,076,000 | $ 63,309,000 | $ 88,574,000
Net gain on equity investments | (3,186,000) | (8,278,000) | (16,000)
Net premium amortization in excess of discount accretion on securities | 8,466,000 | 2,997,000 | 3,232,000
Amortization of deferred costs on borrowings | 0 | (476,000) |
Net amortization of purchase accounting adjustments | (14,484,000) | (21,557,000) | (14,094,000)
Net cash provided by operating activities | 159,972,000 | 132,656,000 | 100,247,000
Cash flows from investing activities: |  |  |
Proceeds from sales of equity investments | 98,777,000 | 16,978,000 | 0
Purchase of equity investments | (86,462,000) | (96,519,000) | (214,000)
Net cash used in investing activities | (1,477,842,000) | (22,169,000) | (172,122,000)
Cash flows from financing activities: |  |  |
Net proceeds from issuance of subordinated notes | 0 | 122,180,000 | 0
Repayments of other borrowings | (7,612,000) | (8,109,000) | (263,000)
Dividends paid | (44,510,000) | (42,917,000) | (34,241,000)
Purchase of treasury stock | (36,059,000) | (14,814,000) | (26,066,000)
Net proceeds from the issuance of preferred stock | 0 | 55,529,000 | 0
Exercise of stock options | 1,946,000 | 1,241,000 | 1,335,000
Net cash provided by financing activities | 223,993,000 | 1,074,948,000 | 82,773,000
OceanFirst Financial Corp. |  |  |
Cash flows from operating activities: |  |  |
Net income | 110,076,000 | 63,309,000 | 88,574,000
Decrease (increase) in advances to subsidiary Bank | 37,824,000 | (73,426,000) | (13,852,000)
Undistributed earnings of subsidiary Bank | (73,311,000) | (4,071,000) | (15,928,000)
Net gain on equity investments | (7,499,000) | (20,460,000) | 0
Net premium amortization in excess of discount accretion on securities | 755,000 | 0 | 0
Amortization of deferred costs on borrowings | 824,000 | 576,000 | 261,000
Net amortization of purchase accounting adjustments | 542,000 | 638,000 | 453,000
Change in other assets and other liabilities | 7,359,000 | 648,000 | (184,000)
Net cash provided by operating activities | 76,570,000 | (32,786,000) | 59,324,000
Cash flows from investing activities: |  |  |
Proceeds from sales of equity investments | 98,791,000 | 15,339,000 | 0
Purchase of equity investments | (86,462,000) | (95,228,000) | 0
Increase in ESOP loan receivable | (3,200,000) | 0 | 0
Repayments on ESOP loan receivable | 2,040,000 | 1,200,000 | 1,160,000
Net cash used in investing activities | 11,169,000 | (78,689,000) | 1,160,000
Cash flows from financing activities: |  |  |
Net proceeds from issuance of subordinated notes | 0 | 122,180,000 | 0
Repayments of other borrowings | (7,500,000) | (7,999,000) | 0
Dividends paid | (44,510,000) | (42,917,000) | (34,241,000)
Purchase of treasury stock | (36,059,000) | (14,814,000) | (26,066,000)
Net proceeds from the issuance of preferred stock | 0 | 55,529,000 | 0
Exercise of stock options | 1,946,000 | 1,241,000 | 1,335,000
Net cash provided by financing activities | (86,123,000) | 113,220,000 | (58,972,000)
Net increase in cash and due from banks | 1,616,000 | 1,745,000 | 1,512,000
Cash and due from banks at beginning of year | 7,187,000 | 5,442,000 | 3,930,000
Cash and due from banks at end of year | $ 8,803,000 | $ 7,187,000 | $ 5,442,000

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- Definition Proceeds from issuance of capital stock which provides for a specific dividend that is paid to the shareholders before any dividends to common stockholders and which takes precedence over common stockholders in the event of liquidation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3255-108585 + Details
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- Definition The cash inflow from a borrowing where a lender is placed in a lien position behind debt having a higher priority of repayment (senior) in liquidation of the entity's assets or underlying collateral. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3255-108585 + Details
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- Definition The cash inflow from the financed defined contribution plan to acquire shares of the entity. The plan initially holds the shares in a suspense account, which is collateral for the loan. As the plan makes payment on the debt, the shares are released from the suspense account and become available to be allocated to participant accounts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3255-108585 + Details
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- Definition The cash inflow associated with the sale of equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3179-108585 + Details
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- Definition Amount of cash inflow from exercise of option under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120381028&loc=SL79508275-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3255-108585 + Details
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- Definition Amount of cash outflow for the payment of debt classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3291-108585 + Details
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