NET INCOME PER SHARE

Net income per share is based on the weighted average number of shares outstanding. A reconciliation of the shares used in the computation of basic and diluted net income per share is as follows:



	Three Months Ended March 31,
(SHARES IN THOUSANDS)	2018	2017
Basic	79,018	79,098
Assumed dilution under stock plans	375	311
Diluted	79,393	79,409

There were no stock options or stock-settled appreciation rights (“SSARs”) excluded from the computation of diluted net income per share for the three months ended March 31, 2018 and 2017.

The Company has issued shares of purchased restricted common stock and purchased restricted common stock units (collectively “PRSUs”) which contain rights to nonforfeitable dividends while these shares are outstanding and thus are considered participating securities. Such securities are required to be included in the computation of basic and diluted earnings per share pursuant to the two-class method. The Company did not present the two-class method since the difference between basic and diluted net income per share for both unrestricted common shareholders and PRSU shareholders was less than $0.01 per share for each period presented, and the number of PRSUs outstanding as of March 31, 2018 and 2017 was immaterial. Net income allocated to such PRSUs was $0.3 million for both the three months ended March 31, 2018 and 2017.