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GOODWILL AND OTHER INTANGIBLE ASSETS, NET - Additional Information (Detail) $ in Thousands |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Jul. 03, 2015 Branch | Jun. 30, 2015 USD ($) | Jun. 30, 2014 USD ($) | Jun. 30, 2015 USD ($) | Jun. 30, 2014 USD ($) | Dec. 31, 2014 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract] |  |  |  |  |  |
Goodwill |  | $ 31,591 |  | $ 31,591 |  | $ 31,591
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Impairment on intangible assets |  | 258 | $ 0 | 258 | $ 0 |
Aggregate amortization expense |  | 1,545 | $ 944 | 3,089 | $ 1,883 |
Banking |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill transferred between segments |  |  |  | 29,500 |  |
Mortgage Banking |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill transferred between segments |  |  |  | $ 2,100 |  |
Core deposit intangibles |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Impairment on intangible assets |  | $ 258 |  |  |  |
Weighted average amortization period |  |  |  | 7 years 9 months 7 days |  |
Core deposit intangibles | Minimum |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Amortization period of other intangible assets |  |  |  | 4 years |  |
Core deposit intangibles | Maximum |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Amortization period of other intangible assets |  |  |  | 10 years |  |
Customer relationship intangible |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Amortization period of other intangible assets |  |  |  | 5 years |  |
Remaining amortization period |  |  |  | 3 years 6 months 29 days |  |
Subsequent Event |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Number of branches sold | Branch | 2 |  |  |  |  |

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