Quarterly Financial Data (Unaudited)

12 Months Ended

Dec. 31, 2019

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Data (Unaudited)

	Quarter Ended
(in thousands, except per share amounts)	March 31		June 30		Sept. 30		Dec. 31
2019
Revenues	$	1,153,010	$	1,043,316	$	1,043,388	$	1,075,090
Gross profit	226,717		173,735		170,546		161,936
Operating income	85,461		38,720		34,733		27,719
Net income	76,289		28,556		25,859		20,395
Basic net income per share	1.86		0.69		0.64		0.51
Diluted net income per share	1.85		0.69		0.63		0.51
2018
Revenues	$	1,014,372	$	922,295	$	925,126	$	966,756
Gross profit	199,720		154,544		166,054		161,591
Operating income	64,703		33,581		48,133		32,619
Net income	49,991		24,560		36,207		24,655
Basic net income per share	1.20		0.59		0.86		0.59
Diluted net income per share	1.18		0.58		0.86		0.59