Net Profit per Share (Tables)

12 Months Ended

Dec. 31, 2017

Schedule of Earnings Per Share Basic And Diluted

The following table sets forth the computation of basic and diluted net income per share attributable to common stock (in thousands, except per share amounts):



	Year Ended December 31,
	2017		2016		2015
Numerator:
Net income	$	231,418	$	189,682	$	144,020
Denominator:
Weighted-average common shares outstanding, basic	80,085		79,856		79,998
Dilutive effect of potential common stock	1,747		1,628		1,523
Total shares, diluted	81,832		81,484		81,521
Net income per share, basic	$	2.89	$	2.38	$	1.80
Net income per share, diluted	$	2.83	$	2.33	$	1.77