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Investment Securities | 12 Months Ended
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Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract] |
Investment Securities |
5. | INVESTMENT SECURITIES
The amortized cost and estimated fair value of investment securities are summarized below. The majority of securities held are available-for-sale securities with fair value based on quoted prices for similar assets in active markets or quoted prices for identical assets in markets that are not active. Estimated fair values were obtained from an independent pricing service based upon market quotes.
|  | December 31, 2019 |
|  | Amortized Cost |  |  | Gross Unrealized Holding Gain |  |  | Gross Unrealized Holding Loss |  |  | Fair Value |  |  | Total Percent |
|  | (Dollars in thousands) |
Investment securities available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage-backed securities |  | $ | 1,185,757 |  |  | $ | 21,306 |  |  | $ | (750 | ) |  | $ | 1,206,313 |  |  |  | 69.32 | %
CMO/REMIC |  |  | 493,214 |  |  |  | 1,392 |  |  |  | (896 | ) |  |  | 493,710 |  |  |  | 28.37 | %
Municipal bonds |  |  | 38,506 |  |  |  | 850 |  |  |  | (2 | ) |  |  | 39,354 |  |  |  | 2.26 | %
Other securities |  |  | 880 |  |  |  | - |  |  |  | - |  |  |  | 880 |  |  |  | 0.05 | %
Total available-for-sale securities |  | $ | 1,718,357 |  |  | $ | 23,548 |  |  | $ | (1,648 | ) |  | $ | 1,740,257 |  |  |  | 100.00 | %
Investment securities held-to-maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Government agency/GSE |  | $ | 117,366 |  |  | $ | 2,280 |  |  | $ | (657 | ) |  | $ | 118,989 |  |  |  | 17.40 | %
Mortgage-backed securities |  |  | 168,479 |  |  |  | 2,083 |  |  |  | (54 | ) |  |  | 170,508 |  |  |  | 24.98 | %
CMO/REMIC |  |  | 192,548 |  |  |  | - |  |  |  | (2,458 | ) |  |  | 190,090 |  |  |  | 28.55 | %
Municipal bonds |  |  | 196,059 |  |  |  | 3,867 |  |  |  | (565 | ) |  |  | 199,361 |  |  |  | 29.07 | %
Total held-to-maturity securities |  | $ | 674,452 |  |  | $ | 8,230 |  |  | $ | (3,734 | ) |  | $ | 678,948 |  |  |  | 100.00 | %
|  | December 31, 2018 |
|  | Amortized Cost |  |  | Gross Unrealized Holding Gain |  |  | Gross Unrealized Holding Loss |  |  | Fair Value |  |  | Total Percent |
|  | (Dollars in thousands) |
Investment securities available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage-backed securities |  | $ | 1,494,106 |  |  | $ | 1,348 |  |  | $ | (20,946 | ) |  | $ | 1,474,508 |  |  |  | 85.03 | %
CMO/REMIC |  |  | 217,223 |  |  |  | 353 |  |  |  | (3,525 | ) |  |  | 214,051 |  |  |  | 12.34 | %
Municipal bonds |  |  | 45,621 |  |  |  | 332 |  |  |  | (1,143 | ) |  |  | 44,810 |  |  |  | 2.59 | %
Other securities |  |  | 716 |  |  |  | - |  |  |  | - |  |  |  | 716 |  |  |  | 0.04 | %
Total available-for-sale securities |  | $ | 1,757,666 |  |  | $ | 2,033 |  |  | $ | (25,614 | ) |  | $ | 1,734,085 |  |  |  | 100.00 | %
Investment securities held-to-maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Government agency/GSE |  | $ | 138,274 |  |  | $ | 572 |  |  | $ | (2,622 | ) |  | $ | 136,224 |  |  |  | 18.57 | %
Mortgage-backed securities |  |  | 153,874 |  |  |  | - |  |  |  | (3,140 | ) |  |  | 150,734 |  |  |  | 20.67 | %
CMO/REMIC |  |  | 215,336 |  |  |  | - |  |  |  | (12,081 | ) |  |  | 203,255 |  |  |  | 28.93 | %
Municipal bonds |  |  | 236,956 |  |  |  | 556 |  |  |  | (6,188 | ) |  |  | 231,324 |  |  |  | 31.83 | %
Total held-to-maturity securities |  | $ | 744,440 |  |  | $ | 1,128 |  |  | $ | (24,031 | ) |  | $ | 721,537 |  |  |  | 100.00 | %
The following table provides information about the amount of interest income earned on investment securities which is fully taxable and which is exempt from regular federal income tax.
|  | Year Ended December 31, |
|  | 2019 |  |  | 2018 |  |  | 2017 |
|  | (Dollars in thousands) |
Investment securities available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |
Taxable |  | $ | 38,189 |  |  | $ | 44,423 |  |  | $ | 47,596 |
Tax-advantaged |  |  | 1,141 |  |  |  | 1,565 |  |  |  | 2,182 |
Total interest income from available-for-sale securities |  |  | 39,330 |  |  |  | 45,988 |  |  |  | 49,778 |
Investment securities held-to-maturity: |  |  |  |  |  |  |  |  |  |  |  |
Taxable |  |  | 11,498 |  |  |  | 11,848 |  |  |  | 12,558 |
Tax-advantaged |  |  | 5,890 |  |  |  | 7,053 |  |  |  | 8,457 |
Total interest income from held-to-maturity securities |  |  | 17,388 |  |  |  | 18,901 |  |  |  | 21,015 |
Total interest income from investment securities |  | $ | 56,718 |  |  | $ | 64,889 |  |  | $ | 70,793 |
Approximately 90% of the total investment securities portfolio at December 31, 2019 represents securities issued by the U.S government or U.S. government-sponsored enterprises, with the implied guarantee of payment of principal and interest. The tables below show the Company’s investment securities’ gross unrealized losses and fair value by investment category and length of time that individual securities have been in a continuous unrealized loss position at December 31, 2019 and 2018. Management has reviewed individual securities to determine whether a decline in fair value below the amortized cost basis is other-than-temporary. The unrealized losses on these securities were primarily attributed to changes in interest rates. The issuers of these securities have not, to our knowledge, evidenced any cause for default on these securities. These securities have fluctuated in value since their purchase dates as market interest rates have fluctuated. However, we have the ability and the intention to hold these securities until their fair values recover to cost or maturity. As such, management does not deem these securities to be OTTI.
|  | December 31, 2019 |
|  | Less Than 12 Months |  |  | 12 Months or Longer |  |  | Total |
|  | Fair Value |  |  | Gross Unrealized Holding Losses |  |  | Fair Value |  |  | Gross Unrealized Holding Losses |  |  | Fair Value |  |  | Gross Unrealized Holding Losses |
|  | (Dollars in thousands) |
Investment securities available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage-backed securities |  | $ | 20,289 |  |  | $ | (6 | ) |  | $ | 97,964 |  |  | $ | (744 | ) |  | $ | 118,253 |  |  | $ | (750 | )
CMO/REMIC |  |  | 177,517 |  |  |  | (705 | ) |  |  | 34,565 |  |  |  | (191 | ) |  |  | 212,082 |  |  |  | (896 | )
Municipal bonds |  |  | - |  |  |  | - |  |  |  | 563 |  |  |  | (2 | ) |  |  | 563 |  |  |  | (2 | )
Total available-for-sale securities |  | $ | 197,806 |  |  | $ | (711 | ) |  | $ | 133,092 |  |  | $ | (937 | ) |  | $ | 330,898 |  |  | $ | (1,648 | )
Investment securities held-to-maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Government agency/GSE |  | $ | 28,359 |  |  | $ | (252 | ) |  | $ | 19,405 |  |  | $ | (405 | ) |  | $ | 47,764 |  |  | $ | (657 | )
Mortgage-backed securities |  |  | 10,411 |  |  |  | (54 | ) |  |  | - |  |  |  | - |  |  |  | 10,411 |  |  |  | (54 | )
CMO/REMIC |  |  | 23,897 |  |  |  | (104 | ) |  |  | 166,193 |  |  |  | (2,354 | ) |  |  | 190,090 |  |  |  | (2,458 | )
Municipal bonds |  |  | 7,583 |  |  |  | (32 | ) |  |  | 29,981 |  |  |  | (533 | ) |  |  | 37,564 |  |  |  | (565 | )
Total held-to-maturity securities |  | $ | 70,250 |  |  | $ | (442 | ) |  | $ | 215,579 |  |  | $ | (3,292 | ) |  | $ | 285,829 |  |  | $ | (3,734 | )
|  | December 31, 2018 |
|  | Less Than 12 Months |  |  | 12 Months or Longer |  |  | Total |
|  | Fair Value |  |  | Gross Unrealized Holding Losses |  |  | Fair Value |  |  | Gross Unrealized Holding Losses |  |  | Fair Value |  |  | Gross Unrealized Holding Losses |
|  | (Dollars in thousands) |
Investment securities available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage-backed securities |  | $ | 692,311 |  |  | $ | (4,864 | ) |  | $ | 593,367 |  |  | $ | (16,082 | ) |  | $ | 1,285,678 |  |  | $ | (20,946 | )
CMO/REMIC |  |  | 36,582 |  |  |  | (365 | ) |  |  | 135,062 |  |  |  | (3,160 | ) |  |  | 171,644 |  |  |  | (3,525 | )
Municipal bonds |  |  | 9,568 |  |  |  | (188 | ) |  |  | 14,181 |  |  |  | (955 | ) |  |  | 23,749 |  |  |  | (1,143 | )
Total available-for-sale securities |  | $ | 738,461 |  |  | $ | (5,417 | ) |  | $ | 742,610 |  |  | $ | (20,197 | ) |  | $ | 1,481,071 |  |  | $ | (25,614 | )
Investment securities held-to-maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Government agency/GSE |  | $ | 7,479 |  |  |  | $ (15 | ) |  | $ | 54,944 |  |  | $ | (2,607 | ) |  | $ | 62,423 |  |  | $ | (2,622 | )
Mortgage-backed securities |  |  | 59,871 |  |  |  | (484 | ) |  |  | 90,863 |  |  |  | (2,656 | ) |  |  | 150,734 |  |  |  | (3,140 | )
CMO/REMIC |  |  | - |  |  |  | - |  |  |  | 203,254 |  |  |  | (12,081 | ) |  |  | 203,254 |  |  |  | (12,081 | )
Municipal bonds |  |  | 70,989 |  |  |  | (778 | ) |  |  | 77,723 |  |  |  | (5,410 | ) |  |  | 148,712 |  |  |  | (6,188 | )
Total held-to-maturity securities |  | $ | 138,339 |  |  | $ | (1,277 | ) |  | $ | 426,784 |  |  | $ | (22,754 | ) |  | $ | 565,123 |  |  | $ | (24,031 | )
The following summarizes our analysis of these securities and the unrealized losses. Government Agency & Government-Sponsored Enterprise (“GSE”) — The government agency bonds are backed by the full faith and credit of agencies of the U.S. Government. While the Government-Sponsored Enterprise bonds are not expressly guaranteed by the U.S. Government, they are currently being supported by the U.S. Government under a conservatorship arrangement. These securities are bullet securities, that is, they have a defined maturity date on which the principal is paid. The contractual term of these investments provides that the Company will receive the face value of the bond at maturity which will equal the amortized cost of the bond. I nterest is received throughout the life of the security. Accordingly, it is expected that the securities would not be settled at a price less than the amortized cost of the bond s . Mortgage-Backed Securities (“MBS”) and CMO/REMIC — Most of the Company’s mortgage-backed and CMO/REMIC securities are issued by Government Agencies or Government-Sponsored Enterprises such as Ginnie Mae, Fannie Mae and Freddie Mac. These securities are collateralized or backed by the underlying residential or commercial mortgages. All mortgage-backed securities are considered to be rated investment grade with a weighted average life of approximately 3.5 years. Of the total MBS/CMO, 100.00% have the implied guarantee of U.S. Government-Sponsored Agencies and Enterprises. Accordingly, it is expected that the securities would not be settled at a price less than the amortized cost of the bonds. There were no credit-related OTTI recognized in earnings for the years ended December 31, 2019 and 2018. Municipal Bonds — The majority of the Company’s municipal bonds, with maturities of approximately 9.0 years, represented approximately 10% of the total investment portfolio and are predominately AA or higher rated securities. The Company diversifies its holdings by owning selections of securities from different issuers and by holding securities from geographically diversified municipal issuers, thus reducing the Company’s exposure to any single adverse event. The decline in fair value is primarily due to the changes in interest rates. Since the Company does not intend to sell the investments and it is not more likely than not that the Company will be required to sell the investments before recovery of their amortized costs, these investments are not considered OTTI at December 31, 2019. At December 31, 2019 and 2018, investment securities having a carrying value of approximately $1.64 billion and $1.66 billion, respectively, were pledged to secure public deposits, short and long-term borrowings, and for other purposes as required or permitted by law. The amortized cost and fair value of debt securities at December 31, 2019, by contractual maturity, are shown in the table below. Although mortgage-backed securities and CMO/REMIC have contractual maturities through 205 8 , expected maturities will differ from contractual maturities because borrowers may have the right to prepay such obligations without penalty. Mortgage-backed and CMO/REMIC securities are included in maturity categories based upon estimated average lives which incorporate estimated prepayment speeds.
|  | December 31, 2019 |
|  | Available-for-sale |  |  | Held-to-maturity |
|  | Amortized Cost |  |  | Fair Value |  |  | Amortized Cost |  |  | Fair Value |
|  | (Dollars in thousands) |
Due in one year or less |  | $ | 16,048 |  |  | $ | 16,175 |  |  | $ | - |  |  | $ | - |
Due after one year through five years |  |  | 1,414,580 |  |  |  | 1,435,647 |  |  |  | 339,132 |  |  |  | 338,758 |
Due after five years through ten years |  |  | 266,108 |  |  |  | 266,349 |  |  |  | 140,143 |  |  |  | 141,903 |
Due after ten years |  |  | 21,621 |  |  |  | 22,086 |  |  |  | 195,177 |  |  |  | 198,287 |
Total investment securities |  | $ | 1,718,357 |  |  | $ | 1,740,257 |  |  | $ | 674,452 |  |  | $ | 678,948 |
The investment in FHLB stock is periodically evaluated for impairment based on, among other things, the capital adequacy of the FHLB and its overall financial condition. No impairment losses have been recorded through December 31, 2019.

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