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SECURITIES (Tables) | 12 Months Ended
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Dec. 31, 2016
SECURITIES |
Summary of amortized cost and fair value of the available for sale and held to maturity |
|  | December 31, |
|  | 2016 |  |  | 2015 |
(In thousands) |  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |  |  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |
Available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. GSE securities |  | $ | 64,993 |  |  | $ | — |  |  | $ | (1,344 | ) |  | $ | 63,649 |  |  | $ | 63,238 |  |  | $ | — |  |  | $ | (564 | ) |  | $ | 62,674 |
State and municipal obligations |  |  | 117,292 |  |  |  | 212 |  |  |  | (1,339 | ) |  |  | 116,165 |  |  |  | 87,830 |  |  |  | 427 |  |  |  | (322 | ) |  |  | 87,935 |
U.S. GSE residential mortgage-backed securities |  |  | 160,446 |  |  |  | 16 |  |  |  | (2,414 | ) |  |  | 158,048 |  |  |  | 201,297 |  |  |  | 237 |  |  |  | (1,270 | ) |  |  | 200,264 |
U.S. GSE residential collateralized mortgage obligations |  |  | 373,098 |  |  |  | 149 |  |  |  | (5,736 | ) |  |  | 367,511 |  |  |  | 321,253 |  |  |  | 513 |  |  |  | (3,888 | ) |  |  | 317,878 |
U.S. GSE commercial mortgage-backed securities |  |  | 6,337 |  |  |  | 6 |  |  |  | (36 | ) |  |  | 6,307 |  |  |  | 12,491 |  |  |  | 7 |  |  |  | (80 | ) |  |  | 12,418 |
U.S. GSE commercial collateralized mortgage obligations |  |  | 56,148 |  |  |  | — |  |  |  | (956 | ) |  |  | 55,192 |  |  |  | 64,809 |  |  |  | 9 |  |  |  | (620 | ) |  |  | 64,198 |
Other asset backed securities |  |  | 24,250 |  |  |  | — |  |  |  | (1,697 | ) |  |  | 22,553 |  |  |  | 24,250 |  |  |  | — |  |  |  | (1,879 | ) |  |  | 22,371 |
Corporate bonds |  |  | 32,000 |  |  |  | — |  |  |  | (1,703 | ) |  |  | 30,297 |  |  |  | 33,000 |  |  |  | — |  |  |  | (535 | ) |  |  | 32,465 |
Total available for sale |  |  | 834,564 |  |  |  | 383 |  |  |  | (15,225 | ) |  |  | 819,722 |  |  |  | 808,168 |  |  |  | 1,193 |  |  |  | (9,158 | ) |  |  | 800,203 |
Held to maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. GSE securities |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 7,466 |  |  |  | 1 |  |  |  | — |  |  |  | 7,467 |
State and municipal obligations |  |  | 66,666 |  |  |  | 1,085 |  |  |  | (130 | ) |  |  | 67,621 |  |  |  | 64,878 |  |  |  | 1,715 |  |  |  | (113 | ) |  |  | 66,480 |
U.S. GSE residential mortgage-backed securities |  |  | 13,443 |  |  |  | — |  |  |  | (287 | ) |  |  | 13,156 |  |  |  | 7,609 |  |  |  | — |  |  |  | (106 | ) |  |  | 7,503 |
U.S. GSE residential collateralized mortgage obligations |  |  | 61,639 |  |  |  | 352 |  |  |  | (552 | ) |  |  | 61,439 |  |  |  | 60,933 |  |  |  | 617 |  |  |  | (498 | ) |  |  | 61,052 |
U.S. GSE commercial mortgage-backed securities |  |  | 28,772 |  |  |  | 136 |  |  |  | (509 | ) |  |  | 28,399 |  |  |  | 23,056 |  |  |  | 210 |  |  |  | (313 | ) |  |  | 22,953 |
U.S. GSE commercial collateralized mortgage obligations |  |  | 41,717 |  |  |  | 93 |  |  |  | (573 | ) |  |  | 41,237 |  |  |  | 33,409 |  |  |  | 282 |  |  |  | (185 | ) |  |  | 33,506 |
Corporate bonds |  |  | 11,000 |  |  |  | 26 |  |  |  | — |  |  |  | 11,026 |  |  |  | 11,000 |  |  |  | 42 |  |  |  | — |  |  |  | 11,042 |
Total held to maturity |  |  | 223,237 |  |  |  | 1,692 |  |  |  | (2,051 | ) |  |  | 222,878 |  |  |  | 208,351 |  |  |  | 2,867 |  |  |  | (1,215 | ) |  |  | 210,003 |
Total securities |  | $ | 1,057,801 |  |  | $ | 2,075 |  |  | $ | (17,276 | ) |  | $ | 1,042,600 |  |  | $ | 1,016,519 |  |  | $ | 4,060 |  |  | $ | (10,373 | ) |  | $ | 1,010,206 |
Securities having a continuous unrealized loss position aggregated by a period of time less than or greater than 12 months |
|  | December 31, |
|  | 2016 |  |  | 2015 |
|  | Less than 12 months |  |  | Greater than 12 months |  |  | Less than 12 months |  |  | Greater than 12 months |
|  | Estimated |  |  | Gross |  |  | Estimated |  |  | Gross |  |  | Estimated |  |  | Gross |  |  | Estimated |  |  | Gross |
|  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
(In thousands) |  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |
Available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. GSE securities |  | $ | 63,649 |  |  | $ | (1,344 | ) |  | $ | — |  |  | $ | — |  |  | $ | 37,759 |  |  | $ | (235 | ) |  | $ | 24,914 |  |  | $ | (329 | )
State and municipal obligations |  |  | 78,883 |  |  |  | (1,338 | ) |  |  | 240 |  |  |  | (1 | ) |  |  | 39,621 |  |  |  | (298 | ) |  |  | 5,118 |  |  |  | (24 | )
U.S. GSE residential mortgage-backed securities |  |  | 140,514 |  |  |  | (2,409 | ) |  |  | 241 |  |  |  | (5 | ) |  |  | 136,025 |  |  |  | (1,224 | ) |  |  | 1,510 |  |  |  | (46 | )
U.S. GSE residential collateralized mortgage obligations |  |  | 319,197 |  |  |  | (5,221 | ) |  |  | 15,627 |  |  |  | (515 | ) |  |  | 187,543 |  |  |  | (1,781 | ) |  |  | 66,830 |  |  |  | (2,107 | )
U.S. GSE commercial mortgage-backed securities |  |  | 2,573 |  |  |  | (36 | ) |  |  | — |  |  |  | — |  |  |  | 8,594 |  |  |  | (80 | ) |  |  | — |  |  |  | — |
U.S. GSE commercial collateralized mortgage obligations |  |  | 48,901 |  |  |  | (886 | ) |  |  | 6,292 |  |  |  | (70 | ) |  |  | 51,178 |  |  |  | (503 | ) |  |  | 10,034 |  |  |  | (117 | )
Other asset backed securities |  |  | — |  |  |  | — |  |  |  | 22,552 |  |  |  | (1,697 | ) |  |  | — |  |  |  | — |  |  |  | 22,371 |  |  |  | (1,879 | )
Corporate bonds |  |  | 17,834 |  |  |  | (1,166 | ) |  |  | 12,463 |  |  |  | (537 | ) |  |  | 27,640 |  |  |  | (360 | ) |  |  | 4,825 |  |  |  | (175 | )
Total available for sale |  |  | 671,551 |  |  |  | (12,400 | ) |  |  | 57,415 |  |  |  | (2,825 | ) |  |  | 488,360 |  |  |  | (4,481 | ) |  |  | 135,602 |  |  |  | (4,677 | )
Held to maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
State and municipal obligations |  |  | 21,867 |  |  |  | (130 | ) |  |  | — |  |  |  | — |  |  |  | 18,375 |  |  |  | (113 | ) |  |  | — |  |  |  | — |
U.S. GSE residential mortgage-backed securities |  |  | 13,156 |  |  |  | (287 | ) |  |  | — |  |  |  | — |  |  |  | 7,503 |  |  |  | (106 | ) |  |  | — |  |  |  | — |
U.S. GSE residential collateralized mortgage obligations |  |  | 31,297 |  |  |  | (455 | ) |  |  | 3,873 |  |  |  | (97 | ) |  |  | 15,918 |  |  |  | (149 | ) |  |  | 15,679 |  |  |  | (349 | )
U.S. GSE commercial mortgage-backed securities |  |  | 12,860 |  |  |  | (286 | ) |  |  | 5,877 |  |  |  | (223 | ) |  |  | 13,982 |  |  |  | (313 | ) |  |  | — |  |  |  | — |
U.S. GSE commercial collateralized mortgage obligations |  |  | 22,666 |  |  |  | (372 | ) |  |  | 3,790 |  |  |  | (201 | ) |  |  | 7,912 |  |  |  | (8 | ) |  |  | 3,813 |  |  |  | (177 | )
Corporate bonds |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Total held to maturity |  | $ | 101,846 |  |  | $ | (1,530 | ) |  | $ | 13,540 |  |  | $ | (521 | ) |  | $ | 63,690 |  |  | $ | (689 | ) |  | $ | 19,492 |  |  | $ | (526 | )
Summary of amortized cost, fair value and maturities of the available for sale and held to maturity investment securities portfolio |
|  | December 31, 2016 |
|  | Within |  |  | After One but |  |  | After Five but |  |  | After |  |  |  |
|  | One Year |  |  | Within Five Years |  |  | Within Ten Years |  |  | Ten Years |  |  | Total |
|  | Estimated |  |  |  |  |  | Estimated |  |  |  |  |  | Estimated |  |  |  |  |  | Estimated |  |  |  |  |  | Estimated |  |  |  |
|  | Fair |  |  | Amortized |  |  | Fair |  |  | Amortized |  |  | Fair |  |  | Amortized |  |  | Fair |  |  | Amortized |  |  | Fair |  |  | Amortized |
(In thousands) |  | Value |  |  | Cost |  |  | Value |  |  | Cost |  |  | Value |  |  | Cost |  |  | Value |  |  | Cost |  |  | Value |  |  | Cost |
Available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. GSE securities |  | $ | — |  |  | $ | — |  |  | $ | 26,593 |  |  | $ | 26,994 |  |  | $ | 37,056 |  |  | $ | 37,999 |  |  | $ | — |  |  | $ | — |  |  | $ | 63,649 |  |  | $ | 64,993 |
State and municipal obligations |  |  | 14,635 |  |  |  | 14,638 |  |  |  | 50,964 |  |  |  | 51,473 |  |  |  | 42,921 |  |  |  | 43,461 |  |  |  | 7,645 |  |  |  | 7,720 |  |  |  | 116,165 |  |  |  | 117,292 |
U.S. GSE residential mortgage-backed securities |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 16,124 |  |  |  | 16,227 |  |  |  | 141,924 |  |  |  | 144,219 |  |  |  | 158,048 |  |  |  | 160,446 |
U.S. GSE residential collateralized mortgage obligations |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 9,263 |  |  |  | 9,361 |  |  |  | 358,248 |  |  |  | 363,737 |  |  |  | 367,511 |  |  |  | 373,098 |
U.S. GSE commercial mortgage-backed securities |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 6,307 |  |  |  | 6,337 |  |  |  | — |  |  |  | — |  |  |  | 6,307 |  |  |  | 6,337 |
U.S. GSE commercial collateralized mortgage obligations |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 55,192 |  |  |  | 56,148 |  |  |  | 55,192 |  |  |  | 56,148 |
Other asset backed securities |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 22,553 |  |  |  | 24,250 |  |  |  | 22,553 |  |  |  | 24,250 |
Corporate bonds |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 30,297 |  |  |  | 32,000 |  |  |  | — |  |  |  | — |  |  |  | 30,297 |  |  |  | 32,000 |
Total available for sale |  |  | 14,635 |  |  |  | 14,638 |  |  |  | 77,557 |  |  |  | 78,467 |  |  |  | 141,968 |  |  |  | 145,385 |  |  |  | 585,562 |  |  |  | 596,074 |  |  |  | 819,722 |  |  |  | 834,564 |
Held to maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
State and municipal obligations |  |  | 9,631 |  |  |  | 9,635 |  |  |  | 16,982 |  |  |  | 16,818 |  |  |  | 39,133 |  |  |  | 38,361 |  |  |  | 1,875 |  |  |  | 1,852 |  |  |  | 67,621 |  |  |  | 66,666 |
U.S. GSE residential mortgage-backed securities |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 1,688 |  |  |  | 1,701 |  |  |  | 11,468 |  |  |  | 11,742 |  |  |  | 13,156 |  |  |  | 13,443 |
U.S. GSE residential collateralized mortgage obligations |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 7,389 |  |  |  | 7,394 |  |  |  | 54,050 |  |  |  | 54,245 |  |  |  | 61,439 |  |  |  | 61,639 |
U.S. GSE commercial mortgage-backed securities |  |  | — |  |  |  | — |  |  |  | 5,016 |  |  |  | 5,063 |  |  |  | 14,568 |  |  |  | 14,621 |  |  |  | 8,815 |  |  |  | 9,088 |  |  |  | 28,399 |  |  |  | 28,772 |
U.S. GSE commercial collateralized mortgage obligations |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 4,930 |  |  |  | 5,129 |  |  |  | 36,307 |  |  |  | 36,588 |  |  |  | 41,237 |  |  |  | 41,717 |
Corporate bonds |  |  | 11,026 |  |  |  | 11,000 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 11,026 |  |  |  | 11,000 |
Total held to maturity |  |  | 20,657 |  |  |  | 20,635 |  |  |  | 21,998 |  |  |  | 21,881 |  |  |  | 67,708 |  |  |  | 67,206 |  |  |  | 112,515 |  |  |  | 113,515 |  |  |  | 222,878 |  |  |  | 223,237 |
Total securities |  | $ | 35,292 |  |  | $ | 35,273 |  |  | $ | 99,555 |  |  | $ | 100,348 |  |  | $ | 209,676 |  |  | $ | 212,591 |  |  | $ | 698,077 |  |  | $ | 709,589 |  |  | $ | 1,042,600 |  |  | $ | 1,057,801 |

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