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GOODWILL AND OTHER INTANGIBLE ASSETS GOODWILL AND OTHER INTANGIBLE ASSETS-Schedule of Goodwill (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Aug. 30, 2019
Apr. 01, 2018
Sep. 30, 2019
Jun. 30, 2018
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Goodwill [Roll Forward]              
Balance at beginning of year         $ 937,771 $ 880,251 $ 204,084
Goodwill $ 58,000 $ 675,643 $ 58,000 $ 676,200 0 57,520 676,167
Balance at end of year         $ 937,771 $ 937,771 $ 880,251