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Business Combinations - Schedule of Supplemental Pro Forma Financial Information (Details) - USD ($) $ / shares in Units, $ in Thousands | 11 Months Ended | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Two River Bancorp Acquisition |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Net interest income, Actual |  |  | $ 41,978 |  |
Credit loss expense, Actual |  |  | 6,117 |  |
Non-interest income, Actual |  |  | 2,688 |  |
Non-interest expense, Actual |  |  | 27,431 |  |
Provision for income taxes, Actual |  |  | 2,686 |  |
Net income, Actual |  |  | 8,432 |  |
Country Bank Holding Company, Inc. Acquisition |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Net interest income, Actual |  |  | 27,411 |  |
Credit loss expense, Actual |  |  | 4,481 |  |
Non-interest income, Actual |  |  | 45 |  |
Non-interest expense, Actual |  |  | 17,993 |  |
Provision for income taxes, Actual |  |  | 1,204 |  |
Net income, Actual |  |  | $ 3,778 |  |
Capital Bank |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Net interest income, Actual | $ 17,090 |  |  |  |
Credit loss expense, Actual | 385 |  |  |  |
Non-interest income, Actual | 1,456 |  |  |  |
Non-interest expense, Actual | 12,482 |  |  |  |
Provision for income taxes, Actual | 1,193 |  |  |  |
Net income, Actual | $ 4,486 |  |  |  |
Sun Bancorp, Inc. |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Net interest income, Actual |  | $ 63,889 |  |  |
Credit loss expense, Actual |  | 1,215 |  |  |
Non-interest income, Actual |  | 7,961 |  |  |
Non-interest expense, Actual |  | 35,184 |  |  |
Provision for income taxes, Actual |  | 7,090 |  |  |
Net income, Actual |  | $ 28,361 |  |  |
Ocean Shore Holdings Co. |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Net interest income, Pro forma |  |  |  | $ 329,327 | $ 337,118
Provision for credit loss expense, Pro forma |  |  |  | 2,686 | 4,545
Non-interest income, Pro forma |  |  |  | 47,484 | 43,677
Non-interest expense, Pro forma |  |  |  | 240,913 | 258,072
Provision for income taxes, Pro forma |  |  |  | 23,870 | 21,098
Net income, Pro forma |  |  |  | $ 109,342 | $ 97,080
Fully diluted earnings per share, Pro forma |  |  |  | $ 1.79 | $ 1.56

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