NET INCOME PER SHARE (Tables)

9 Months Ended

Sep. 30, 2014

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): 

	Three Months Ended September 30,		Nine Months Ended September 30,
	2014	2013	2014	2013
Weighted average number of basic common shares outstanding	52,405	51,363	52,319	50,690
Weighted average dilutive stock options, restricted stock units and performance share units	272	338	308	359
Assumed conversion of Convertible Senior Notes	347	1,283	421	1,177
Weighted average number of diluted common and common equivalent shares outstanding	53,024	52,984	53,048	52,226
Anti-dilutive potential common shares	2,628	2,923	2,577	2,931