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Investments Securities (Tables) | 6 Months Ended
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Jun. 30, 2019
Investments Securities [Abstract] |
Investment Securities |
| June 30, 2019
|  |  | Gross |  | Gross |  |  |  | Weighted
| Amortized |  | Unrealized |  | Unrealized |  | Fair |  | Average
| Cost |  | Gains |  | Losses |  | Value |  | Yield
| (In thousands)
Available-for-sale |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage-backed securities |  |  |  |  |  |  |  |  |  |  |  |  |
FNMA and FHLMC certificates | $ | 694,431 |  | $ | 1,277 |  | $ | 5,352 |  | $ | 690,356 |  | 2.19%
GNMA certificates |  | 93,126 |  |  | 1,228 |  |  | 7 |  |  | 94,347 |  | 2.84%
CMOs issued by US government-sponsored agencies |  | 59,238 |  |  | - |  |  | 608 |  |  | 58,630 |  | 1.90%
Total mortgage-backed securities |  | 846,795 |  |  | 2,505 |  |  | 5,967 |  |  | 843,333 |  | 2.24%
Investment securities |  |  |  |  |  |  |  |  |  |  |  |  |
US Treasury securities |  | 10,938 |  |  | 1 |  |  | 32 |  |  | 10,907 |  | 1.36%
Obligations of US government-sponsored agencies |  | 2,147 |  |  | - |  |  | 16 |  |  | 2,131 |  | 1.38%
Other debt securities |  | 1,031 |  |  | 31 |  |  | - |  |  | 1,062 |  | 2.97%
Total investment securities |  | 14,116 |  |  | 32 |  |  | 48 |  |  | 14,100 |  | 1.48%
Total securities available for sale | $ | 860,911 |  | $ | 2,537 |  | $ | 6,015 |  | $ | 857,433 |  | 2.23%
| December 31, 2018
|  |  | Gross |  | Gross |  |  |  | Weighted
| Amortized |  | Unrealized |  | Unrealized |  | Fair |  | Average
| Cost |  | Gains |  | Losses |  | Value |  | Yield
| (In thousands)
Available-for-sale |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage-backed securities |  |  |  |  |  |  |  |  |  |  |  |  |
FNMA and FHLMC certificates | $ | 561,878 |  | $ | 404 |  | $ | 8,951 |  | $ | 553,331 |  | 2.59%
GNMA certificates |  | 211,947 |  |  | 1,050 |  |  | 2,827 |  |  | 210,170 |  | 3.10%
CMOs issued by US government-sponsored agencies |  | 66,230 |  |  | - |  |  | 2,166 |  |  | 64,064 |  | 1.90%
Total mortgage-backed securities |  | 840,055 |  |  | 1,454 |  |  | 13,944 |  |  | 827,565 |  | 2.66%
Investment securities |  |  |  |  |  |  |  |  |  |  |  |  |
US Treasury securities |  | 10,924 |  |  | - |  |  | 119 |  |  | 10,805 |  | 1.36%
Obligations of US government-sponsored agencies |  | 2,325 |  |  | - |  |  | 60 |  |  | 2,265 |  | 1.38%
Other debt securities |  | 1,207 |  |  | 15 |  |  | - |  |  | 1,222 |  | 2.99%
Total investment securities |  | 14,456 |  |  | 15 |  |  | 179 |  |  | 14,292 |  | 1.50%
Total securities available-for-sale | $ | 854,511 |  | $ | 1,469 |  | $ | 14,123 |  | $ | 841,857 |  | 2.64%
Held-to-maturity |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage-backed securities |  |  |  |  |  |  |  |  |  |  |  |  |
FNMA and FHLMC certificates | $ | 424,740 |  | $ | - |  | $ | 14,387 |  | $ | 410,353 |  | 2.07%
| June 30, 2019
| Available-for-sale
| Amortized Cost |  | Fair Value
| (In thousands)
Mortgage-backed securities |  |  |  |  |
Due from 1 to 5 years |  |  |  |  |
FNMA and FHLMC certificates | $ | 2,509 |  | $ | 2,536
Total due from 1 to 5 years |  | 2,509 |  |  | 2,536
Due after 5 to 10 years |  |  |  |  |
CMOs issued by US government-sponsored agencies | $ | 52,094 |  | $ | 51,538
FNMA and FHLMC certificates |  | 192,744 |  |  | 192,666
Total due after 5 to 10 years |  | 244,838 |  |  | 244,204
Due after 10 years |  |  |  |  |
FNMA and FHLMC certificates | $ | 499,178 |  | $ | 495,154
GNMA certificates |  | 93,126 |  |  | 94,347
CMOs issued by US government-sponsored agencies |  | 7,144 |  |  | 7,092
Total due after 10 years |  | 599,448 |  |  | 596,593
Total mortgage-backed securities |  | 846,795 |  |  | 843,333
Investment securities |  |  |  |  |
Due less than one year |  |  |  |  |
US Treasury securities | $ | 10,938 |  | $ | 10,907
Total due in less than one year |  | 10,938 |  |  | 10,907
Due from 1 to 5 years |  |  |  |  |
Obligations of US government-sponsored agencies | $ | 2,147 |  | $ | 2,131
Other debt securities |  | 100 |  |  | 100
Total due from 1 to 5 years |  | 2,247 |  |  | 2,231
Due from 5 to 10 years |  |  |  |  |
Other debt securities |  | 931 |  |  | 962
Total due after 5 to 10 years |  | 931 |  |  | 962
Total investment securities |  | 14,116 |  |  | 14,100
Total | $ | 860,911 |  | $ | 857,433
Gross Realized Gains and Losses by Category |
| Six-Month Period Ended June 30, 2019
|  |  | Book Value |  |  |  |
Description | Sale Price |  | at Sale |  | Gross Gains |  | Gross Losses
| (In thousands)
Sale of securities available-for-sale |  |  |  |  |  |  |  |  |  |  |
Mortgage-backed securities |  |  |  |  |  |  |  |  |  |  |
FNMA and FHLMC certificates | $ | 213,376 |  | $ | 211,549 |  | $ | 1,827 |  | $ | -
GNMA certificates | $ | 141,125 |  | $ | 138,177 |  | $ | 2,949 |  | $ | -
Total | $ | 354,501 |  | $ | 349,726 |  | $ | 4,776 |  | $ | -
Unrealized Gains and Losses by Category |
| June 30, 2019
| 12 months or more
| Amortized |  | Unrealized |  | Fair
| Cost |  | Loss |  | Value
| (In thousands)
Securities available-for-sale |  |  |  |  |  |  |  |
CMOs issued by US Government-sponsored agencies | $ | 59,238 |  | $ | 608 |  | $ | 58,630
FNMA and FHLMC certificates |  | 480,959 |  |  | 5,352 |  |  | 475,607
Obligations of US Government and sponsored agencies |  | 2,147 |  |  | 16 |  |  | 2,131
GNMA certificates |  | 4,181 |  |  | 6 |  |  | 4,175
US Treasury Securities |  | 9,990 |  |  | 32 |  |  | 9,958
| $ | 556,515 |  | $ | 6,014 |  | $ | 550,501
| Less than 12 months
| Amortized |  | Unrealized |  | Fair
| Cost |  | Loss |  | Value
| (In thousands)
Securities available-for-sale |  |  |  |  |  |  |  |
GNMA certificates |  | 20 |  |  | 1 |  |  | 19
| $ | 20 |  | $ | 1 |  | $ | 19
| Total
| Amortized |  | Unrealized |  | Fair
| Cost |  | Loss |  | Value
| (In thousands)
Securities available-for-sale |  |  |  |  |  |  |  |
CMOs issued by US government-sponsored agencies | $ | 59,238 |  | $ | 608 |  | $ | 58,630
FNMA and FHLMC certificates |  | 480,959 |  |  | 5,352 |  |  | 475,607
Obligations of US government and sponsored agencies |  | 2,147 |  |  | 16 |  |  | 2,131
GNMA certificates |  | 4,201 |  |  | 7 |  |  | 4,194
US Treasury Securities |  | 9,990 |  |  | 32 |  |  | 9,958
| $ | 556,535 |  | $ | 6,015 |  | $ | 550,520
| December 31, 2018
| 12 months or more
| Amortized |  | Unrealized |  | Fair
| Cost |  | Loss |  | Value
| (In thousands)
Securities available-for-sale |  |  |  |  |  |  |  |
CMOs issued by US Government-sponsored agencies | $ | 66,230 |  | $ | 2,166 |  | $ | 64,064
FNMA and FHLMC certificates |  | 357,955 |  |  | 8,603 |  |  | 349,352
Obligations of US Government and sponsored agencies |  | 2,325 |  |  | 60 |  |  | 2,265
GNMA certificates |  | 131,044 |  |  | 2,739 |  |  | 128,305
US Treasury Securities |  | 9,977 |  |  | 119 |  |  | 9,858
| $ | 567,531 |  | $ | 13,687 |  | $ | 553,844
Securities held-to-maturity |  |  |  |  |  |  |  |
FNMA and FHLMC certificates | $ | 424,740 |  | $ | 14,387 |  | $ | 410,353
| Less than 12 months
| Amortized |  | Unrealized |  | Fair
| Cost |  | Loss |  | Value
| (In thousands)
Securities available-for-sale |  |  |  |  |  |  |  |
FNMA and FHLMC certificates |  | 109,772 |  |  | 348 |  |  | 109,424
GNMA certificates |  | 17,126 |  |  | 88 |  |  | 17,038
US Treasury Securities |  | 323 |  |  | - |  |  | 323
| $ | 127,221 |  | $ | 436 |  | $ | 126,785
| Total
| Amortized |  | Unrealized |  | Fair
| Cost |  | Loss |  | Value
| (In thousands)
Securities available-for-sale |  |  |  |  |  |  |  |
CMOs issued by US Government-sponsored agencies |  | 66,230 |  |  | 2,166 |  |  | 64,064
FNMA and FHLMC certificates |  | 467,727 |  |  | 8,951 |  |  | 458,776
Obligations of US government and sponsored agencies |  | 2,325 |  |  | 60 |  |  | 2,265
GNMA certificates |  | 148,170 |  |  | 2,827 |  |  | 145,343
US Treasury Securities |  | 10,300 |  |  | 119 |  |  | 10,181
| $ | 694,752 |  | $ | 14,123 |  | $ | 680,629
Securities held-to-maturity |  |  |  |  |  |  |  |
FNMA and FHLMC certificates | $ | 424,740 |  | $ | 14,387 |  | $ | 410,353

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