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SECURITIES AVAILABLE FOR SALE - Gross Unrealized Losses and Fair Value of Company's Available for Sale Securities (Detail) - USD ($) $ in Thousands | Sep. 30, 2016 | Dec. 31, 2015
--- | --- | ---
Fair Value |  |
Less Than 12 Months | $ 74,958 | $ 183,310
12 Months or More | 20,397 | 18,376
Total | 95,355 | 201,686
Unrealized Losses |  |
Less Than 12 Months | 1,843 | 1,430
12 Months or More | 279 | 610
Total | 2,122 | 2,040
U.S. Government Agencies |  |
Fair Value |  |
Less Than 12 Months | 5,875 | 27,640
12 Months or More | 14,233 | 0
Total | 20,108 | 27,640
Unrealized Losses |  |
Less Than 12 Months | 12 | 182
12 Months or More | 70 | 0
Total | 82 | 182
States and political subdivisions |  |
Fair Value |  |
Less Than 12 Months | 0 | 30,252
12 Months or More | 5,452 | 14,139
Total | 5,452 | 44,391
Unrealized Losses |  |
Less Than 12 Months | 0 | 373
12 Months or More | 202 | 570
Total | 202 | 943
GSE residential mortgage-backed securities |  |
Fair Value |  |
Less Than 12 Months |  | 82,911
12 Months or More |  | 0
Total |  | 82,911
Unrealized Losses |  |
Less Than 12 Months |  | 269
12 Months or More |  | 0
Total |  | 269
GSE residential collateralized mortgage obligations (CMOs) |  |
Fair Value |  |
Less Than 12 Months | 63,107 | 0
12 Months or More | 712 | 4,237
Total | 63,819 | 4,237
Unrealized Losses |  |
Less Than 12 Months | 1,779 | 0
12 Months or More | 7 | 40
Total | 1,786 | 40
GSE commercial CMOs |  |
Fair Value |  |
Less Than 12 Months |  | 33,606
12 Months or More |  | 0
Total |  | 33,606
Unrealized Losses |  |
Less Than 12 Months |  | 563
12 Months or More |  | 0
Total |  | 563
Private label CMOs |  |
Fair Value |  |
Less Than 12 Months | 5,976 | 8,901
12 Months or More | 0 | 0
Total | 5,976 | 8,901
Unrealized Losses |  |
Less Than 12 Months | 52 | 43
12 Months or More | 0 | 0
Total | $ 52 | $ 43

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