NET INCOME PER SHARE (Tables)

9 Months Ended

Sep. 30, 2021

Earnings Per Share [Abstract]

Reconciliation of the Weighted Average Number of Shares Outstanding Used in Calculating Diluted Net Income Per Share

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

	Three Months Ended September 30,		Nine Months Ended September 30,
	2021	2020	2021	2020
Weighted-average number of basic common shares outstanding	41,068	40,935	41,032	40,983
Weighted-average dilutive stock options, restricted stock units and performance share units	178	146	202	142
Assumed conversion of convertible senior notes	96	—	125	17
Weighted-average number of diluted common and common equivalent shares outstanding	41,342	41,081	41,359	41,142