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GOODWILL AND OTHER INTANGIBLE ASSETS, NET - Additional Information (Detail) - USD ($) |  | 3 Months Ended |
--- | --- | --- | ---
Aug. 31, 2016 | Mar. 31, 2017 | Mar. 31, 2016 | Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Goodwill |  | $ 37,144,000 |  | $ 37,144,000
Goodwill write-off | $ 0 |  |  |
Aggregate amortization expense |  | 1,090,000 | $ 1,322,000 |
Mortgage Banking |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Goodwill write-off |  | 2,100,000 |  |
Trade name intangibles |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Intangible asset write-off |  | $ 90,000 |  |
Core deposit intangibles |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Weighted average amortization period |  | 5 years 8 months 12 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] |  |  |  |
Intangible asset write-off |  | $ 246,000 |  |

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=64834752&loc=SL49117168-202975 + Details
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