GOODWILL AND INTANGIBLE ASSETS (Information Concerning Intangible Assets with Finite Life) (Details) - USD ($) |
Dec. 31, 2020 |
Dec. 31, 2019 |
|---|---|---|
| Finite-Lived Intangible Assets [Line Items] | ||
| Total estimated amortization expense | $ 57,185,000 | |
| Core Deposits | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross Carrying Value | 135,300,000 | $ 135,300,000 |
| Accumulated Amortization | 88,109,000 | 73,336,000 |
| Total estimated amortization expense | 47,191,000 | 61,964,000 |
| Other Amortizable Intangibles | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross Carrying Value | 15,240,000 | 15,349,000 |
| Accumulated Amortization | 5,246,000 | 3,644,000 |
| Total estimated amortization expense | $ 9,994,000 | $ 11,705,000 |
| X | ||||||||||
- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount before accumulated amortization of finite-lived intangible assets classified as other. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|