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INVESTMENT SECURITIES - Summary of Investment Securities with Unrealized Losses (Detail) - USD ($) $ in Thousands | Jun. 30, 2015 | Dec. 31, 2014
--- | --- | ---
Fair Value |  |
Less Than 12 Months | $ 5,225 |
12 Months or Longer | 0 |
Total | 5,225 |
Gross Unrealized Losses |  |
Less Than 12 Months | (193) |
12 Months or Longer | 0 |
Total | (193) |
Fair Value |  |
Less Than 12 Months | 141,657 | $ 68,572
12 Months or Longer | 10,651 | 23,567
Total | 152,308 | 92,139
Gross Unrealized Losses |  |
Less Than 12 Months | (1,211) | (341)
12 Months or Longer | (130) | (277)
Total | (1,341) | (618)
Corporate bonds |  |
Fair Value |  |
Less Than 12 Months | 5,225 |
12 Months or Longer | 0 |
Total | 5,225 |
Gross Unrealized Losses |  |
Less Than 12 Months | (193) |
12 Months or Longer | 0 |
Total | (193) |
Private label residential mortgage-backed securities |  |
Fair Value |  |
Less Than 12 Months | 160 | 372
12 Months or Longer | 510 | 1,355
Total | 670 | 1,727
Gross Unrealized Losses |  |
Less Than 12 Months | 0 | (9)
12 Months or Longer | (2) | (4)
Total | (2) | (13)
Agency mortgage-backed securities |  |
Fair Value |  |
Less Than 12 Months | 141,497 | 68,200
12 Months or Longer | 10,141 | 22,212
Total | 151,638 | 90,412
Gross Unrealized Losses |  |
Less Than 12 Months | (1,211) | (332)
12 Months or Longer | (128) | (273)
Total | $ (1,339) | $ (605)

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