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SECURITIES (Details) - USD ($) $ in Thousands | Mar. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Available for sale: |  |
Amortized Cost | $ 836,741 | $ 834,564
Gross Unrealized Gains | 755 | 383
Gross Unrealized Losses | (13,981) | (15,225)
Estimated Fair Value | 823,515 | 819,722
Held to maturity: |  |
Amortized Cost | 214,961 | 223,237
Gross Unrealized Gains | 1,773 | 1,692
Gross Unrealized Losses | (2,112) | (2,051)
Estimated Fair Value | 214,622 | 222,878
Total securities |  |
Amortized Cost | 1,051,702 | 1,057,801
Gross Unrealized Gains | 2,528 | 2,075
Gross Unrealized Losses | (16,093) | (17,276)
Total securities | 1,038,137 | 1,042,600
U.S. GSE securities |  |
Available for sale: |  |
Amortized Cost | 64,993 | 64,993
Gross Unrealized Gains |  |
Gross Unrealized Losses | (1,160) | (1,344)
Estimated Fair Value | 63,833 | 63,649
State and municipal obligations |  |
Available for sale: |  |
Amortized Cost | 116,222 | 117,292
Gross Unrealized Gains | 469 | 212
Gross Unrealized Losses | (960) | (1,339)
Estimated Fair Value | 115,731 | 116,165
Held to maturity: |  |
Amortized Cost | 65,064 | 66,666
Gross Unrealized Gains | 1,274 | 1,085
Gross Unrealized Losses | (87) | (130)
Estimated Fair Value | 66,251 | 67,621
U.S. GSE residential mortgage-backed securities |  |
Available for sale: |  |
Amortized Cost | 182,139 | 160,446
Gross Unrealized Gains | 41 | 16
Gross Unrealized Losses | (2,358) | (2,414)
Estimated Fair Value | 179,822 | 158,048
Held to maturity: |  |
Amortized Cost | 12,973 | 13,443
Gross Unrealized Gains |  |
Gross Unrealized Losses | (285) | (287)
Estimated Fair Value | 12,688 | 13,156
U.S. GSE residential collateralized mortgage obligations |  |
Available for sale: |  |
Amortized Cost | 356,471 | 373,098
Gross Unrealized Gains | 217 | 149
Gross Unrealized Losses | (5,200) | (5,736)
Estimated Fair Value | 351,488 | 367,511
Held to maturity: |  |
Amortized Cost | 59,590 | 61,639
Gross Unrealized Gains | 338 | 352
Gross Unrealized Losses | (586) | (552)
Estimated Fair Value | 59,342 | 61,439
U.S. GSE commercial mortgage-backed securities |  |
Available for sale: |  |
Amortized Cost | 6,296 | 6,337
Gross Unrealized Gains | 25 | 6
Gross Unrealized Losses | (37) | (36)
Estimated Fair Value | 6,284 | 6,307
Held to maturity: |  |
Amortized Cost | 28,595 | 28,772
Gross Unrealized Gains | 98 | 136
Gross Unrealized Losses | (495) | (509)
Estimated Fair Value | 28,198 | 28,399
U.S. GSE commercial collateralized mortgage obligations |  |
Available for sale: |  |
Amortized Cost | 54,370 | 56,148
Gross Unrealized Gains | 3 |
Gross Unrealized Losses | (1,028) | (956)
Estimated Fair Value | 53,345 | 55,192
Held to maturity: |  |
Amortized Cost | 37,739 | 41,717
Gross Unrealized Gains | 30 | 93
Gross Unrealized Losses | (659) | (573)
Estimated Fair Value | 37,110 | 41,237
Other asset backed securities |  |
Available for sale: |  |
Amortized Cost | 24,250 | 24,250
Gross Unrealized Gains |  |
Gross Unrealized Losses | (1,455) | (1,697)
Estimated Fair Value | 22,795 | 22,553
Corporate bonds |  |
Available for sale: |  |
Amortized Cost | 32,000 | 32,000
Gross Unrealized Gains |  |
Gross Unrealized Losses | (1,783) | (1,703)
Estimated Fair Value | 30,217 | 30,297
Held to maturity: |  |
Amortized Cost | 11,000 | 11,000
Gross Unrealized Gains | 33 | 26
Gross Unrealized Losses |  |
Estimated Fair Value | $ 11,033 | $ 11,026

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