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INVESTMENT SECURITIES | 12 Months Ended
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Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract] |
INVESTMENT SECURITIES | INVESTMENT SECURITIES The following table presents the amortized cost and fair value of the investment securities portfolio as of the dates indicated:
($ in thousands) |  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
December 31, 2019 |  |  |  |  |  |  |  |
Securities available-for-sale: |  |  |  |  |  |  |  |
U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities |  | $ | 37,613 |  |  | $ | — |  |  | $ | (1,157 | ) |  | $ | 36,456 |
U.S. government agency and U.S. government sponsored enterprise collateralized mortgage obligations |  | 91,543 |  |  | 16 |  |  | (260 | ) |  | 91,299 |
Municipal securities |  | 52,997 |  |  | 51 |  |  | (359 | ) |  | 52,689 |
Non-agency residential mortgage-backed securities |  | 191 |  |  | 5 |  |  | — |  |  | 196 |
Collateralized loan obligations |  | 733,605 |  |  | — |  |  | (15,244 | ) |  | 718,361 |
Corporate debt securities |  | 13,500 |  |  | 79 |  |  | — |  |  | 13,579 |
Total securities available-for-sale |  | $ | 929,449 |  |  | $ | 151 |  |  | $ | (17,020 | ) |  | $ | 912,580 |
December 31, 2018 |  |  |  |  |  |  |  |
Securities available-for-sale: |  |  |  |  |  |  |  |
SBA loan pool securities |  | $ | 911 |  |  | $ | — |  |  | $ | (1 | ) |  | $ | 910 |
U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities |  | 461,987 |  |  | — |  |  | (24,545 | ) |  | 437,442 |
Non-agency residential mortgage-backed securities |  | 418 |  |  | 9 |  |  | — |  |  | 427 |
Non-agency commercial mortgage-backed securities |  | 132,199 |  |  | — |  |  | — |  |  | 132,199 |
Collateralized loan obligations |  | 1,431,171 |  |  | 141 |  |  | (9,790 | ) |  | 1,421,522 |
Total securities available-for-sale |  | $ | 2,026,686 |  |  | $ | 150 |  |  | $ | (34,336 | ) |  | $ | 1,992,500 |
During the year ended December 31, 2019, in response to a changing interest rate environment we repositioned our securities available-for-sale portfolio by reducing the overall duration through sales of certain longer-duration and fixed-rate mortgage-backed securities. Additionally, we continued to strategically reduce our collateralized loan obligations exposure. As a result, we recognized $731 thousand of OTTI for the year ended December 31, 2019. As of December 31, 2018, we changed our intent and decided to sell our non-agency commercial mortgage-backed securities in an unrealized loss position due to our strategy to reposition our securities profile and recognized $3.3 million of other-than-temporary impairment (OTTI) losses during the fourth quarter of 2018. At December 31, 2019, our investment securities portfolio included collateralized loan obligations, agency securities, municipal securities, corporate debt securities and mortgage-backed securities. The expected maturities of the collateralized loan obligations, agency securities and mortgage-backed securities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. The expected maturities of municipal securities and corporate debt securities may also differ from contractual maturities as the issuer may have the ability to redeem these securities prior to the contractual maturity dates. At December 31, 2019 and December 31, 2018, there were no holdings of any one issuer, other than the U.S. Government and its agencies, in an amount greater than 10% of our stockholders’ equity. The following table presents proceeds from sales and calls of securities available-for-sale and the associated gross gains and losses realized through earnings upon the sales and calls of securities available-for-sale for the periods indicated:
|  | Year Ended December 31,
($ in thousands) |  | 2019 |  | 2018 |  | 2017
Gross realized gains on sales and calls of securities available-for-sale |  | $ | 556 |  |  | $ | 5,532 |  |  | $ | 14,768 |
Gross realized losses on sales and calls of securities available-for-sale |  | (5,408 | ) |  | — |  |  | — |
Net realized (losses) gains on sales and calls of securities available-for-sale |  | $ | (4,852 | ) |  | $ | 5,532 |  |  | $ | 14,768 |
Proceeds from sales and calls of securities available-for-sale |  | $ | 1,249,588 |  |  | $ | 1,025,471 |  |  | $ | 1,500,459 |
Investment securities with carrying values of $44.0 million and $163.0 million as of December 31, 2019 and December 31, 2018 were pledged to secure FHLB advances, public deposits and for other purposes as required or permitted by law. The following table summarizes the investment securities with unrealized losses by security type and length of time in a continuous unrealized loss position as of the dates indicated:
|  | Less Than 12 Months |  | 12 Months or Longer |  | Total
($ in thousands) |  | Fair Value |  | Gross Unrealized Losses |  | Fair Value |  | Gross Unrealized Losses |  | Fair Value |  | Gross Unrealized Losses
December 31, 2019 |  |  |  |  |  |  |  |  |  |  |  |
Securities available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |
U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities |  | $ | 35,872 |  |  | $ | (1,157 | ) |  | $ | — |  |  | $ | — |  |  | $ | 35,872 |  |  | $ | (1,157 | )
U.S. government agency and U.S. government sponsored enterprise collateralized mortgage obligations |  | 73,379 |  |  | (260 | ) |  | — |  |  | — |  |  | 73,379 |  |  | (260 | )
Municipal securities |  | 31,723 |  |  | (359 | ) |  | — |  |  | — |  |  | 31,723 |  |  | (359 | )
Collateralized loan obligations |  | 49,553 |  |  | (447 | ) |  | 668,808 |  |  | (14,797 | ) |  | 718,361 |  |  | (15,244 | )
Corporate debt securities |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total securities available-for-sale |  | $ | 190,527 |  |  | $ | (2,223 | ) |  | $ | 668,808 |  |  | $ | (14,797 | ) |  | $ | 859,335 |  |  | $ | (17,020 | )
December 31, 2018 |  |  |  |  |  |  |  |  |  |  |  |
Securities available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |
SBA loan pool securities |  | $ | — |  |  | $ | — |  |  | $ | 910 |  |  | $ | (1 | ) |  | $ | 910 |  |  | $ | (1 | )
U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities |  | 13,494 |  |  | (133 | ) |  | 423,916 |  |  | (24,412 | ) |  | 437,410 |  |  | (24,545 | )
Non-agency residential mortgage-backed securities |  | 90 |  |  | — |  |  | 16 |  |  | — |  |  | 106 |  |  | — |
Collateralized loan obligations |  | 1,364,317 |  |  | (9,480 | ) |  | 32,790 |  |  | (310 | ) |  | 1,397,107 |  |  | (9,790 | )
Total securities available-for-sale |  | $ | 1,377,901 |  |  | $ | (9,613 | ) |  | $ | 457,632 |  |  | $ | (24,723 | ) |  | $ | 1,835,533 |  |  | $ | (34,336 | )
At December 31, 2019, our securities available-for-sale portfolio consisted of 70 securities, 60 of which were in an unrealized loss position. At December 31, 2018, our securities available-for-sale portfolio consisted of 145 securities, 118 of which were in an unrealized loss position. We monitor our securities portfolio to ensure it has adequate credit support. The majority of unrealized losses are related to our collateralized loan obligations. We also consider the lowest credit rating for identification of potential OTTI for other securities. As of December 31, 2019, nearly all of our non-agency mortgage-backed securities and collateralized loan obligations investment securities in an unrealized loss position received an investment grade credit rating. The decline in fair value is attributable to changes in interest rates, and not credit quality. We do not have the intent to sell the remaining 60 securities in an unrealized loss position and further believe it is not likely that we will be required to sell these securities before their anticipated recovery. The following table presents the composition and the repricing and yield information of the investment securities portfolio as of December 31, 2019:
|  | One year or less |  | More than One Year through Five Years |  | More than Five Years through Ten Years |  | More than Ten Years |  | Total
($ in thousands) |  | Fair Value |  | Weighted-Average Yield |  | Fair Value |  | Weighted-Average Yield |  | Fair Value |  | Weighted-Average Yield |  | Fair Value |  | Weighted-Average Yield |  | Fair Value |  | Weighted-Average Yield
Securities available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities |  | $ | — |  |  | — | % |  | $ | — |  |  | — | % |  | $ | — |  |  | — | % |  | $ | 36,456 |  |  | 2.56 | % |  | $ | 36,456 |  |  | 2.56 | %
U.S. government agency and U.S. government sponsored enterprise collateralized mortgage obligations |  | 81,347 |  |  | 2.28 | % |  | — |  |  | — | % |  | 9,952 |  |  | 2.47 | % |  | — |  |  | — | % |  | 91,299 |  |  | 2.30 | %
Municipal securities |  | — |  |  | — | % |  | — |  |  | — | % |  | — |  |  | — | % |  | 52,689 |  |  | 2.79 | % |  | 52,689 |  |  | 2.79 | %
Non-agency residential mortgage-backed securities |  | — |  |  | — | % |  | — |  |  | — | % |  | — |  |  | — | % |  | 196 |  |  | 6.28 | % |  | 196 |  |  | 6.28 | %
Collateralized loan obligations |  | 718,361 |  |  | 3.61 | % |  | — |  |  | — | % |  | — |  |  | — | % |  | — |  |  | — | % |  | 718,361 |  |  | 3.61 | %
Corporate debt securities |  | — |  |  | — | % |  | 13,579 |  |  | 4.11 | % |  | — |  |  | — | % |  | — |  |  | — | % |  | 13,579 |  |  | 4.11 | %
Total securities available-for-sale |  | $ | 799,708 |  |  | 3.47 | % |  | $ | 13,579 |  |  | 4.11 | % |  | $ | 9,952 |  |  | 2.47 | % |  | $ | 89,341 |  |  | 2.70 | % |  | $ | 912,580 |  |  | 3.40 | %

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