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NET INCOME PER SHARE (Details) - shares
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Earnings Per Share [Abstract]    
Weighted-average number of basic common shares outstanding (in shares) 41,093,000 45,007,000
Weighted-average dilutive stock options, restricted stock units and performance share units (in shares) 0 229,000
Assumed conversion of Convertible Senior Notes (in shares) 0 200,000
Weighted-average number of diluted common and common equivalent shares outstanding (in shares) 41,093,000 45,436,000
Anti-dilutive potential common shares (in shares) 259,000