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SECURITIES (Details) - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Available for sale: |  |
Amortized Cost | $ 802,432 | $ 834,564
Gross Unrealized Gains | 658 | 383
Gross Unrealized Losses | (11,032) | (15,225)
Estimated Fair Value | 792,058 | 819,722
Held to maturity: |  |
Amortized Cost | 189,603 | 223,237
Gross Unrealized Gains | 2,006 | 1,692
Gross Unrealized Losses | (1,504) | (2,051)
Estimated Fair Value | 190,105 | 222,878
Total securities |  |
Amortized Cost | 992,035 | 1,057,801
Gross Unrealized Gains | 2,664 | 2,075
Gross Unrealized Losses | (12,536) | (17,276)
Total securities | 982,163 | 1,042,600
U.S. GSE securities |  |
Available for sale: |  |
Amortized Cost | 64,994 | 64,993
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (766) | (1,344)
Estimated Fair Value | 64,228 | 63,649
State and municipal obligations |  |
Available for sale: |  |
Amortized Cost | 91,359 | 117,292
Gross Unrealized Gains | 430 | 212
Gross Unrealized Losses | (469) | (1,339)
Estimated Fair Value | 91,320 | 116,165
Held to maturity: |  |
Amortized Cost | 60,616 | 66,666
Gross Unrealized Gains | 1,446 | 1,085
Gross Unrealized Losses | (36) | (130)
Estimated Fair Value | 62,026 | 67,621
U.S. GSE residential mortgage-backed securities |  |
Available for sale: |  |
Amortized Cost | 195,062 | 160,446
Gross Unrealized Gains | 112 | 16
Gross Unrealized Losses | (1,770) | (2,414)
Estimated Fair Value | 193,404 | 158,048
Held to maturity: |  |
Amortized Cost | 11,905 | 13,443
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (175) | (287)
Estimated Fair Value | 11,730 | 13,156
U.S. GSE residential collateralized mortgage obligations |  |
Available for sale: |  |
Amortized Cost | 323,427 | 373,098
Gross Unrealized Gains | 75 | 149
Gross Unrealized Losses | (4,300) | (5,736)
Estimated Fair Value | 319,202 | 367,511
Held to maturity: |  |
Amortized Cost | 55,871 | 61,639
Gross Unrealized Gains | 389 | 352
Gross Unrealized Losses | (348) | (552)
Estimated Fair Value | 55,912 | 61,439
U.S. GSE commercial mortgage-backed securities |  |
Available for sale: |  |
Amortized Cost | 6,129 | 6,337
Gross Unrealized Gains | 41 | 6
Gross Unrealized Losses | (17) | (36)
Estimated Fair Value | 6,153 | 6,307
Held to maturity: |  |
Amortized Cost | 28,202 | 28,772
Gross Unrealized Gains | 158 | 136
Gross Unrealized Losses | (350) | (509)
Estimated Fair Value | 28,010 | 28,399
U.S. GSE commercial collateralized mortgage obligations |  |
Available for sale: |  |
Amortized Cost | 51,211 | 56,148
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (825) | (956)
Estimated Fair Value | 50,386 | 55,192
Held to maturity: |  |
Amortized Cost | 33,009 | 41,717
Gross Unrealized Gains | 13 | 93
Gross Unrealized Losses | (595) | (573)
Estimated Fair Value | 32,427 | 41,237
Other asset backed securities |  |
Available for sale: |  |
Amortized Cost | 24,250 | 24,250
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (1,213) | (1,697)
Estimated Fair Value | 23,037 | 22,553
Corporate bonds |  |
Available for sale: |  |
Amortized Cost | 46,000 | 32,000
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (1,672) | (1,703)
Estimated Fair Value | $ 44,328 | 30,297
Held to maturity: |  |
Amortized Cost |  | 11,000
Gross Unrealized Gains |  | 26
Gross Unrealized Losses |  | 0
Estimated Fair Value |  | $ 11,026

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