NET INCOME PER SHARE (Tables)

12 Months Ended

Dec. 31, 2019

Earnings Per Share [Abstract]

Reconciliation of the weighted average number of shares outstanding used in calculating diluted earnings per share

A reconciliation of the weighted-average number of shares outstanding used in calculating diluted earnings per share is as follows (in thousands): 

	For the Year Ended December 31,
	2019	2018	2017
Weighted-average number of basic common shares outstanding	43,082	47,446	48,994
Weighted-average dilutive stock options, restricted stock units and performance share units	203	236	295
Assumed conversion of convertible senior notes	224	335	665
Weighted-average number of diluted common and common equivalent shares outstanding	43,509	48,017	49,954