Quarterly Financial Data (Unaudited)

12 Months Ended

Dec. 31, 2016

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Data (Unaudited)

Quarterly Financial Data (Unaudited)

The following tabulation shows certain quarterly financial data for 2016 and 2015 (in thousands, except per share amounts):

	Quarter
2016	1		2		3		4
Net service revenues	$	1,302,625	$	1,344,160	$	1,338,541	$	1,265,073
Gross margin	$	531,972	$	556,993	$	552,509	$	519,202
Income before income taxes	$	133,791	$	149,414	$	146,324	$	124,581
Net income	$	83,416	$	91,616	$	90,569	$	77,788
Basic net income per share	$	.65	$	.71	$	.71	$	.61
Diluted net income per share	$	.64	$	.71	$	.71	$	.61

	Quarter
2015	1		2		3		4
Net service revenues	$	1,205,563	$	1,272,058	$	1,312,718	$	1,304,594
Gross margin	$	494,087	$	530,502	$	549,801	$	540,081
Income before income taxes	$	128,174	$	149,235	$	159,306	$	144,315
Net income	$	77,922	$	89,706	$	96,725	$	93,443
Basic net income per share	$	.59	$	.68	$	.74	$	.71
Diluted net income per share	$	.58	$	.67	$	.73	$	.71