Quarterly Financial Data (Unaudited)

12 Months Ended

Dec. 31, 2018

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Data (Unaudited)

Quarterly Financial Data (Unaudited)

The following tabulation shows certain quarterly financial data for 2018 and 2017 (in thousands, except per share amounts):

	Quarter
2018	1		2		3		4
Net service revenues	$	1,395,333	$	1,457,054	$	1,466,226	$	1,481,658
Gross margin	$	572,366	$	607,118	$	610,468	$	620,062
Income before income taxes	$	134,639	$	150,075	$	151,905	$	154,983
Net income	$	96,167	$	109,315	$	115,242	$	113,564
Basic net income per share	$	.79	$	.90	$	.96	$	.96
Diluted net income per share	$	.78	$	.89	$	.95	$	.95

	Quarter
2017	1		2		3		4
Net service revenues	$	1,287,370	$	1,308,428	$	1,324,709	$	1,346,282
Gross margin	$	525,828	$	538,438	$	546,400	$	553,146
Income before income taxes	$	125,501	$	130,707	$	132,270	$	129,038
Net income	$	78,521	$	80,316	$	84,700	$	47,047
Basic net income per share	$	.63	$	.64	$	.69	$	.38
Diluted net income per share	$	.62	$	.64	$	.68	$	.38