Quarterly Financial Data (Unaudited)

12 Months Ended

Dec. 31, 2020

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Data (Unaudited)

Quarterly Financial Data (Unaudited)

The following tabulation shows certain quarterly financial data for 2020 and 2019 (in thousands, except per share amounts):

	Quarter
2020	One		Two		Three		Four
Service revenues	$	1,506,691	$	1,108,326	$	1,189,897	$	1,304,086
Gross margin	$	614,388	$	416,535	$	467,346	$	514,342
Income before income taxes	$	131,763	$	58,024	$	102,510	$	129,585
Net income	$	89,915	$	46,196	$	75,749	$	94,416
Basic net income per share	$	.79	$	.41	$	.67	$	.84
Diluted net income per share	$	.79	$	.41	$	.67	$	.84

	Quarter
2019	One		Two		Three		Four
Service revenues	$	1,468,530	$	1,516,385	$	1,552,132	$	1,537,385
Gross margin	$	605,401	$	636,589	$	646,278	$	636,861
Income before income taxes	$	147,383	$	160,103	$	163,782	$	154,247
Net income	$	109,798	$	114,612	$	117,181	$	112,842
Basic net income per share	$	.94	$	.98	$	1.02	$	.99
Diluted net income per share	$	.93	$	.98	$	1.01	$	.98