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SECURITIES AVAILABLE FOR SALE - Summary of Securities Available For Sale With Unrealized Losses (Detail) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Fair Value |  |
Less Than 12 Months | $ 139,058 | $ 183,310
12 Months or More | 24,245 | 18,376
Total | 163,303 | 201,686
Unrealized Losses |  |
Less Than 12 Months | 4,195 | 1,430
12 Months or More | 708 | 610
Total | 4,903 | 2,040
U.S. Government Agencies |  |
Fair Value |  |
Less Than 12 Months | 10,710 | 27,640
12 Months or More | 13,531 | 0
Total | 24,241 | 27,640
Unrealized Losses |  |
Less Than 12 Months | 23 | 182
12 Months or More | 101 | 0
Total | 124 | 182
States and political subdivisions |  |
Fair Value |  |
Less Than 12 Months | 58,924 | 30,252
12 Months or More | 5,075 | 14,139
Total | 63,999 | 44,391
Unrealized Losses |  |
Less Than 12 Months | 610 | 373
12 Months or More | 567 | 570
Total | 1,177 | 943
GSE residential mortgage-backed securities |  |
Fair Value |  |
Less Than 12 Months | 5,034 | 82,911
12 Months or More | 0 | 0
Total | 5,034 | 82,911
Unrealized Losses |  |
Less Than 12 Months | 6 | 269
12 Months or More | 0 | 0
Total | 6 | 269
GSE residential collateralized mortgage obligations (CMOs) |  |
Fair Value |  |
Less Than 12 Months | 59,534 | 0
12 Months or More | 634 | 4,237
Total | 60,168 | 4,237
Unrealized Losses |  |
Less Than 12 Months | 3,264 | 0
12 Months or More | 4 | 40
Total | 3,268 | 40
GSE commercial CMOs |  |
Fair Value |  |
Less Than 12 Months | 4,856 | 33,606
12 Months or More | 0 | 0
Total | 4,856 | 33,606
Unrealized Losses |  |
Less Than 12 Months | 292 | 563
12 Months or More | 0 | 0
Total | 292 | 563
Private label CMOs |  |
Fair Value |  |
Less Than 12 Months | 0 | 8,901
12 Months or More | 5,005 | 0
Total | 5,005 | 8,901
Unrealized Losses |  |
Less Than 12 Months | 0 | 43
12 Months or More | 36 | 0
Total | $ 36 | $ 43

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