Revision To Previously Reported Financial Information (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2011

Dec. 31, 2010

Revision To Previously Reported Financial Information [Abstract]

Correction Of Immaterial Error On Impacted Line Items Of The Consolidated Statements Of Income

	For the Three Months Ended				For the Nine Months Ended
	September 30, 2010				September 30, 2010
(in thousands, except per share data)	As Reported		As Revised		As Reported		As Revised
Direct cost of revenues	$	204,095	$	206,831	$	610,586	$	617,640
Selling, general and administrative expense		85,796		86,115		252,399		253,196
Special charges		—		—		30,245		29,356
Operating income		49,963		46,908		133,754		126,792
Income before income tax provision		35,425		32,370		98,733		91,771
Income tax provision		13,462		12,206		37,519		34,642
Net income		21,963		20,164		61,214		57,129
Earnings per common share:
Basic	$	0.48	$	0.44	$	1.34	$	1.25
Diluted	$	0.47	$	0.43	$	1.28	$	1.19

Correction Of Immaterial Error On Impacted Line Items Of The Consolidated Balance Sheet

	December 31, 2010
(in thousands)	As Reported		As Revised
Current portion notes receivable	$	26,130	$	28,397
Total current assets		788,715		790,892
Notes receivable, net of current portion		87,677		76,539
Total assets		2,414,359		2,405,488
Deferred income taxes		4,052		1,072
Total current liabilities		289,282		286,302
Deferred income taxes		92,134		85,956
Total liabilities		1,247,040		1,237,882
Additional paid-in capital		532,929		546,336
Retained earnings		687,419		674,299
Total stockholders' equity		1,167,319		1,167,606
Total liabilities and stockholders' equity		2,414,359		2,405,488