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SECURITIES (Details) - USD ($) $ in Thousands | Mar. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Available for sale: |  |
Amortized Cost | $ 881,917 | $ 808,168
Gross Unrealized Gains | 5,642 | 1,193
Gross Unrealized Losses | (3,933) | (9,158)
Estimated Fair Value | 883,626 | 800,203
Held to maturity: |  |
Amortized Cost | 218,278 | 208,351
Gross Unrealized Gains | 5,564 | 2,867
Gross Unrealized Losses | (307) | (1,215)
Estimated Fair Value | 223,535 | 210,003
Total securities |  |
Amortized Cost | 1,100,195 | 1,016,519
Gross Unrealized Gains | 11,206 | 4,060
Gross Unrealized Losses | (4,240) | (10,373)
Total securities | 1,107,161 | 1,010,206
U.S. GSE securities |  |
Available for sale: |  |
Amortized Cost | 67,242 | $ 63,238
Gross Unrealized Gains | 82 |
Gross Unrealized Losses | (18) | $ (564)
Estimated Fair Value | $ 67,306 | 62,674
Held to maturity: |  |
Amortized Cost |  | 7,466
Gross Unrealized Gains |  | $ 1
Gross Unrealized Losses |  |
Estimated Fair Value |  | $ 7,467
State and municipal obligations |  |
Available for sale: |  |
Amortized Cost | $ 102,417 | 87,830
Gross Unrealized Gains | 1,346 | 427
Gross Unrealized Losses | (84) | (322)
Estimated Fair Value | 103,679 | 87,935
Held to maturity: |  |
Amortized Cost | 63,326 | 64,878
Gross Unrealized Gains | $ 2,620 | 1,715
Gross Unrealized Losses |  | (113)
Estimated Fair Value | $ 65,946 | 66,480
U.S. GSE residential mortgage-backed securities |  |
Available for sale: |  |
Amortized Cost | 214,827 | 201,297
Gross Unrealized Gains | 1,775 | 237
Gross Unrealized Losses | (78) | (1,270)
Estimated Fair Value | 216,524 | 200,264
Held to maturity: |  |
Amortized Cost | 12,393 | $ 7,609
Gross Unrealized Gains | 34 |
Gross Unrealized Losses | (13) | $ (106)
Estimated Fair Value | 12,414 | 7,503
U.S. GSE residential collateralized mortgage obligations |  |
Available for sale: |  |
Amortized Cost | 360,008 | 321,253
Gross Unrealized Gains | 1,663 | 513
Gross Unrealized Losses | (808) | (3,888)
Estimated Fair Value | 360,863 | 317,878
Held to maturity: |  |
Amortized Cost | 63,969 | 60,933
Gross Unrealized Gains | 1,544 | 617
Gross Unrealized Losses | (66) | (498)
Estimated Fair Value | 65,447 | 61,052
U.S. GSE commercial mortgage-backed securities |  |
Available for sale: |  |
Amortized Cost | 12,432 | 12,491
Gross Unrealized Gains | $ 224 | 7
Gross Unrealized Losses |  | (80)
Estimated Fair Value | $ 12,656 | 12,418
Held to maturity: |  |
Amortized Cost | 29,291 | 23,056
Gross Unrealized Gains | 512 | 210
Gross Unrealized Losses | (81) | (313)
Estimated Fair Value | 29,722 | 22,953
U.S. GSE commercial collateralized mortgage obligations |  |
Available for sale: |  |
Amortized Cost | 68,741 | 64,809
Gross Unrealized Gains | 449 | 9
Gross Unrealized Losses | (129) | (620)
Estimated Fair Value | 69,061 | 64,198
Held to maturity: |  |
Amortized Cost | 38,299 | 33,409
Gross Unrealized Gains | 821 | 282
Gross Unrealized Losses | (147) | (185)
Estimated Fair Value | 38,973 | 33,506
Other asset backed securities |  |
Available for sale: |  |
Amortized Cost | $ 24,250 | $ 24,250
Gross Unrealized Gains |  |
Gross Unrealized Losses | $ (1,940) | $ (1,879)
Estimated Fair Value | 22,310 | 22,371
Corporate bonds |  |
Available for sale: |  |
Amortized Cost | 32,000 | $ 33,000
Gross Unrealized Gains | 103 |
Gross Unrealized Losses | (876) | $ (535)
Estimated Fair Value | 31,227 | 32,465
Held to maturity: |  |
Amortized Cost | 11,000 | 11,000
Gross Unrealized Gains | $ 33 | $ 42
Gross Unrealized Losses |  |
Estimated Fair Value | $ 11,033 | $ 11,042

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