NET INCOME PER SHARE

3 Months Ended

Mar. 31, 2014

Earnings Per Share [Abstract]

NET INCOME PER SHARE

NET INCOME PER SHARE

The Company computes basic net income per share by dividing net income by the weighted average number of common shares outstanding during the period.  Diluted net income per share is based upon the weighted average number of common and common equivalent shares outstanding during the period.

Common equivalent shares related to stock options, restricted stock units and performance share units are calculated using the treasury stock method.  Performance share units are included in the weighted average common equivalent shares based on the number of shares that would be issued if the end of the reporting period were the end of the performance period, if the result would be dilutive.

The Company's convertible debt issues have net share settlement features requiring the Company upon conversion to settle the principal amount of the debt for cash and the conversion premium for cash or shares of the Company's common stock, at the Company's option.  The convertible notes are included in the calculation of diluted net income per share if their inclusion is dilutive under the treasury stock method.

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 March 31,
	2014	2013
Weighted average number of basic common shares outstanding	52,153	49,939
Weighted average dilutive stock options, restricted stock units and performance share units	317	351
Assumed conversion of Convertible Senior Notes	548	1,063
Weighted average number of diluted common and common equivalent shares outstanding	53,018	51,353
Anti-dilutive potential common shares	2,069	2,196

Anti-dilutive potential common shares for the three months ended March 31, 2014 include approximately 1.7 million shares that could be issued under the Company's outstanding convertible notes, if the Company experiences substantial increases in its common stock price.  Under the treasury stock method, the convertible notes will generally have a dilutive impact on net income per share if the Company's average stock price for the period exceeds the conversion price for the convertible notes.