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GOODWILL (Tables) | 3 Months Ended
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Mar. 31, 2020
Finite-Lived Intangible Assets [Line Items] |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
(Dollars in thousands) |  | March 31, 2020 |  | December 31, 2019
|  | Gross carrying amount |  | Accumulated amortization |  | Gross carrying amount |  | Accumulated amortization
Amortized intangible assets |  |  |  |  |  |  |  |
Core deposit intangibles |  | $ | 51,031 |  |  | $ | (22,743 | ) |  | $ | 51,031 |  |  | $ | (21,149 | )
Customer list |  | 39,420 |  |  | (2,090 | ) |  | 39,420 |  |  | (1,195 | )
Other |  | 10,093 |  |  | (2,453 | ) |  | 10,093 |  |  | (1,999 | )
Total |  | $ | 100,544 |  |  | $ | (27,286 | ) |  | $ | 100,544 |  |  | $ | (24,343 | )
Changes in Carrying Amount of Goodwill |
(Dollars in thousands) |  | March 31, 2020 |  | March 31, 2019
Balance at beginning of year |  | $ | 937,771 |  |  | $ | 880,251 |
Goodwill resulting from business combinations |  | 0 |  |  | (524 | )
Balance at end of period |  | $ | 937,771 |  |  | $ | 879,727 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + 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) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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