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Note 9 - Goodwill and Intangible Assets - Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Balance | $ 1,400,880 | $ 1,409,674
Acquisitions of businesses, net | 6,739 | 22,565
Foreign currency translation | 24,765 | (31,359)
Balance | 1,432,384 | 1,400,880
Goodwill, gross | 1,940,188 | 1,908,684
Accumulated impairment | (507,804) | (507,804)
Goodwill | 1,432,384 | 1,400,880
Domestic [Member] |  |
Balance | 1,016,657 | 995,444
Acquisitions of businesses, net | 1,376 | 22,128
Foreign currency translation | 495 | (915)
Balance | 1,018,528 | 1,016,657
Goodwill, gross | 1,521,721 | 1,519,850
Accumulated impairment | (503,193) | (503,193)
Goodwill | 1,018,528 | 1,016,657
International [Member] |  |
Balance | 384,223 | 414,230
Acquisitions of businesses, net | 5,363 | 437
Foreign currency translation | 24,270 | (30,444)
Balance | 413,856 | 384,223
Goodwill, gross | 418,467 | 388,834
Accumulated impairment | (4,611) | (4,611)
Goodwill | $ 413,856 | $ 384,223

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