Net Income Per Common Share (Tables)

9 Months Ended

Sep. 30, 2015

Earnings Per Share [Abstract]

Calculation of Diluted Net Income (Loss) Per Common Share

The following table reconciles the numerator and denominator used to calculate diluted net income per common share:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
Numerator:
Net income	$	79,510	$	77,993	$	102,218	$	112,247
Denominator:
Weighted-average common shares, basic		162,390		154,112		159,198		153,258
Dilutive effect of common stock equivalents		5,680		8,334		5,256		8,190
Weighted-average common shares, diluted		168,070		162,446		164,454		161,448