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GOODWILL AND OTHER INTANGIBLES - Gross Amount and Accumulated Amortization of Other Intangible Assets (Detail) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 | Dec. 31, 2018 | Jun. 30, 2012
Finite Lived Intangible Assets [Line Items] |  |  |
Net carrying amount | $ 3,900 | $ 4,300 |
Core Deposits [Member] |  |  |
Finite Lived Intangible Assets [Line Items] |  |  |
Gross amount | 51,664 | 51,664 |
Accumulated amortization | (47,761) | (47,329) |
Net carrying amount | $ 3,903 | $ 4,335 |
Remaining amortization period | 5 years 7 months 6 days | 6 years |
Customer Relationships [Member] | Credit Card [Member] |  |  |
Finite Lived Intangible Assets [Line Items] |  |  |
Gross amount | $ 24,465 | $ 24,465 | $ 24,500
Accumulated amortization | (19,806) | (18,763) |
Net carrying amount | $ 4,659 | $ 5,702 |
Remaining amortization period | 2 years 4 months 24 days | 2 years 10 months 24 days |
Customer Relationships [Member] | Insurance Customer Intangible [Member] |  |  |
Finite Lived Intangible Assets [Line Items] |  |  |
Gross amount | $ 1,067 | $ 1,067 |
Accumulated amortization | (521) | (445) |
Net carrying amount | $ 546 | $ 622 |
Remaining amortization period | 3 years 6 months | 4 years |

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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