NET INCOME PER SHARE (Tables)

9 Months Ended

Sep. 30, 2013

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,
	2013	2012	2013	2012
Weighted average number of basic common shares outstanding	51,363	49,851	50,690	49,830
Weighted average dilutive stock options, restricted stock units and performance share units	338	353	359	475
Assumed conversion of convertible debt	1,283	981	1,177	990
Weighted average number of diluted common and common equivalent shares outstanding	52,984	51,185	52,226	51,295
Anti-dilutive potential common shares	2,923	2,335	2,931	2,246