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INVESTMENT SECURITIES (Details 3) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Available-for-sale securities |  |
Less Than 12 Months, Market Value | $ 246,748 | $ 233,177
Less Than 12 Months, Unrealized Losses | 1,541 | 499
Greater Than 12 Months, Market Value | 6,993 | 14,710
Greater Than 12 Months, Unrealized Losses | 35 | 76
Total Market Value | 253,741 | 247,887
Total Unrealized Losses | 1,576 | 575
Held-to-maturity debt securities |  |
Less Than 12 Months, Market Value | 79,411 | 114,403
Less Than 12 Months, Unrealized Losses | 718 | 357
Greater Than 12 Months, Market Value | 4,010 | 11,889
Greater Than 12 Months Or Longer, Unrealized Losses | 38 | 222
Total Market Value | 83,421 | 126,292
Total Unrealized Losses | 756 | 579
U.S. Treasury [Member] |  |
Available-for-sale securities |  |
Less Than 12 Months, Market Value | 116,704 | 150,061
Less Than 12 Months, Unrealized Losses | 851 | 213
Greater Than 12 Months, Market Value | 0 | 0
Greater Than 12 Months, Unrealized Losses | 0 | 0
Total Market Value | 116,704 | 150,061
Total Unrealized Losses | 851 | 213
U.S. Government Agency [Member] |  |
Available-for-sale securities |  |
Less Than 12 Months, Market Value | 48,520 | 43,508
Less Than 12 Months, Unrealized Losses | 310 | 200
Greater Than 12 Months, Market Value | 6,699 | 9,644
Greater Than 12 Months, Unrealized Losses | 34 | 63
Total Market Value | 55,219 | 53,152
Total Unrealized Losses | 344 | 263
States and Political Subdivisions [Member] |  |
Available-for-sale securities |  |
Less Than 12 Months, Market Value | 81,521 | 39,608
Less Than 12 Months, Unrealized Losses | 380 | 86
Greater Than 12 Months, Market Value | 294 | 5,066
Greater Than 12 Months, Unrealized Losses | 1 | 13
Total Market Value | 81,815 | 44,674
Total Unrealized Losses | 381 | 99
Mortgage-Backed Securities [Member] |  |
Available-for-sale securities |  |
Less Than 12 Months, Market Value | 3 | 0
Less Than 12 Months, Unrealized Losses | 0 | 0
Greater Than 12 Months, Market Value | 0 | 0
Greater Than 12 Months, Unrealized Losses | 0 | 0
Total Market Value | 3 | 0
Total Unrealized Losses | 0 | 0
U.S. Treasury [Member] |  |
Held-to-maturity debt securities |  |
Less Than 12 Months, Market Value | 35,210 | 92,339
Less Than 12 Months, Unrealized Losses | 81 | 160
Greater Than 12 Months, Market Value | 0 | 0
Greater Than 12 Months Or Longer, Unrealized Losses | 0 | 0
Total Market Value | 35,210 | 92,339
Total Unrealized Losses | 81 | 160
U.S. Government Agency [Member] |  |
Held-to-maturity debt securities |  |
Less Than 12 Months, Market Value | 0 | 5,006
Less Than 12 Months, Unrealized Losses | 0 | 5
Greater Than 12 Months, Market Value | 0 | 0
Greater Than 12 Months Or Longer, Unrealized Losses | 0 | 0
Total Market Value | 0 | 5,006
Total Unrealized Losses | 0 | 5
States and Political Subdivisions [Member] |  |
Held-to-maturity debt securities |  |
Less Than 12 Months, Market Value | 7,491 | 3,791
Less Than 12 Months, Unrealized Losses | 38 | 7
Greater Than 12 Months, Market Value | 0 | 0
Greater Than 12 Months Or Longer, Unrealized Losses | 0 | 0
Total Market Value | 7,491 | 3,791
Total Unrealized Losses | 38 | 7
Mortgage-Backed Securities [Member] |  |
Held-to-maturity debt securities |  |
Less Than 12 Months, Market Value | 36,710 | 13,267
Less Than 12 Months, Unrealized Losses | 599 | 185
Greater Than 12 Months, Market Value | 4,010 | 11,889
Greater Than 12 Months Or Longer, Unrealized Losses | 38 | 222
Total Market Value | 40,720 | 25,156
Total Unrealized Losses | $ 637 | $ 407

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