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SECURITIES (Detail Textuals) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016 | Dec. 31, 2016
Other than Temporary Impairment Losses, Investments [Abstract] |  |  |  |  |
Guaranteed portion of student loan backed bonds |  |  | Student loan backed bonds which are guaranteed by the U.S. Department of Education for 97% to 100% of principal. |  |
Credit support for student loan backed bonds description |  |  | The bonds have credit support of 3% to 5% |  |
Proceeds from sales of securities available for sale | $ 26,700 |  | $ 26,685 | $ 264,358 |
Gross gains realized on sale of securities available for sale | 300 |  | 300 | 1,600 |
Gross losses realized on sale of securities available for sale | 100 |  | 100 | 1,200 |
Proceeds from calls of securities |  | $ 13,300 |  | $ 66,200 |
Fair value of securities pledged to secure public deposits and FHLB and FRB overnight borrowings | 522,700 |  | 522,700 |  | $ 570,100
Amount owned in FHLB, ACBB and FRB stock | $ 34,234 |  | $ 34,234 |  | $ 34,743

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