Selected Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2016

Quarterly Financial Information Disclosure [Abstract]

Summary of Selected Quarterly Financial Data

The following table sets forth the selected quarterly financial data for each of the quarters in 2016 (in thousands, except per share amounts):

	Quarter Ended
	March 31,		June 30,		September 30,		December 31,
	2016		2016		2016		2016
Year Ended December 31, 2016:
Revenue	$	805,859	$	855,557	$	932,814	$	978,560
Gross margin		108,387		114,490		111,454		120,454
Operating income		28,843		34,297		29,855		30,839
Net income		17,965		20,671		17,924		18,244
Basic earnings per share	$	0.51	$	0.61	$	0.54	$	0.55
Diluted earnings per share	$	0.51	$	0.61	$	0.54	$	0.55

The following table sets forth the selected quarterly financial data for each of the quarters in 2015 (in thousands, except per share amounts):

	Quarter Ended
	March 31,		June 30,		September 30,		December 31,
	2015		2015		2015		2015
Year Ended December 31, 2015:
Revenue	$	835,941	$	899,513	$	899,869	$	890,272
Gross margin		89,128		101,729		105,064		116,774
Operating income		18,795		29,476		33,418		35,341
Net income		10,276		18,467		19,832		22,374
Basic earnings per share	$	0.28	$	0.51	$	0.55	$	0.63
Diluted earnings per share	$	0.28	$	0.51	$	0.55	$	0.63