Net Income Per Share (Tables)

3 Months Ended

Mar. 31, 2017

Earnings Per Share [Abstract]

Reconciliation of Weighted Average Common Shares Outstanding

A reconciliation of weighted average shares outstanding used to calculate basic net income per share and diluted net income per share follows:

	Three months ended March 31
	2017	2016
	(in thousands)
Weighted average shares outstanding (basic)	174,150	173,331
Impact of common stock equivalents	1,427	1,085
Weighted average shares outstanding (diluted)	175,577	174,416