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INCOME TAXES - SCHEDULE OF INCOME BEFORE INCOME TAX, DOMESTIC AND FOREIGN (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Income Tax Disclosure [Abstract]                      
United States                 $ 198,556 $ 180,957 $ 80,881
Foreign                 82,469 71,483 50,670
Income before income taxes $ 73,658 $ 80,467 $ 73,442 $ 53,458 $ 63,844 $ 71,939 $ 66,289 $ 50,368 $ 281,025 $ 252,440 $ 131,551