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GOODWILL AND INTANGIBLE ASSETS - Gross amount and accumulated amortization by category (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items] |  |
Gross amount | $ 531,359 | $ 525,088
Accumulated amortization | (254,077) | (285,546)
Total intangible assets | 277,282 | 239,542
Impairment charges | 3,500 |
Customer lists, trademark and non-compete - Media Pro |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross amount | 9,700 | 9,700
Accumulated amortization | (9,598) | (9,700)
Total intangible assets | 102 | 0
Customer relationships and customers lists - Ternian |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross amount | 13,330 | 13,330
Accumulated amortization | (4,999) | (6,333)
Total intangible assets | 8,331 | 6,997
Coverholders |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross amount | 63,565 | 63,565
Accumulated amortization | (6,622) | (11,918)
Total intangible assets | 56,943 | 51,647
Large brokers |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross amount | 46,641 | 46,641
Accumulated amortization | (3,888) | (6,996)
Total intangible assets | 42,753 | 39,645
SME brokers |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross amount | 14,126 | 14,126
Accumulated amortization | (1,471) | (2,649)
Total intangible assets | 12,655 | 11,477
MGA contract |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross amount | 4,131 |
Accumulated amortization | (4,131) |
Total intangible assets | 0 |
Impairment charges | 3,500 |
U.S. state licenses |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross amount | 26,036 | 26,036
Total intangible assets | 26,036 | 26,036
Syndicate capacity |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross amount | 94,748 | 94,748
Total intangible assets | 94,748 | 94,748
Avaibel | VOBA - Novae |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross amount | 2,140 |
Accumulated amortization | (2,140) |
Total intangible assets | 0 |
Novae | VOBA - Novae |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross amount | 256,942 | 256,942
Accumulated amortization | (221,228) | (247,950)
Total intangible assets | $ 35,714 | $ 8,992

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