Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2014

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Data

The following tabulation shows certain quarterly financial data for 2014 and 2013 (in thousands, except per share amounts):

	Quarter
2014	1		2		3		4
Net service revenues	$	1,084,342	$	1,164,914	$	1,224,308	$	1,221,450
Gross margin	$	438,495	$	478,444	$	505,220	$	500,757
Income before income taxes	$	102,014	$	123,653	$	138,361	$	133,321
Net income	$	61,551	$	75,140	$	85,184	$	84,053
Net income available to common stockholders - diluted	$	61,551	$	75,140	$	85,184	$	84,053
Basic net income per share	$	.45	$	.56	$	.64	$	.63
Diluted net income per share	$	.45	$	.55	$	.63	$	.62

	Quarter
2013	1		2		3		4
Net service revenues	$	1,023,684	$	1,063,228	$	1,075,119	$	1,083,864
Gross margin	$	410,290	$	432,108	$	437,478	$	443,216
Income before income taxes	$	89,376	$	100,596	$	103,713	$	103,894
Net income	$	55,863	$	63,089	$	66,358	$	66,885
Net income available to common stockholders - diluted	$	55,861	$	63,088	$	66,358	$	66,885
Basic net income per share	$	.41	$	.46	$	.49	$	.49
Diluted net income per share	$	.40	$	.46	$	.48	$	.49