Business Segment And Geographic Area Information (Tables)

12 Months Ended

Dec. 31, 2011

Segment Reporting, Measurement Disclosures [Abstract]

Schedule Of Revenue By Geographic Customer And Related Percentage Of Total Revenue

Revenues by geographic customer and the related percentages of total revenues for the years ended December 31, 2011, 2010 and 2009, were as follows (dollars in thousands):

	Year Ended December 31,
	2011				2010				2009
United States	$	2,861,038	99.7	%	$	2,583,600	99.2	%	$	1,999,308	99.0	%
International	8,944		0.3	%	20,438		0.8	%	21,026		1.0	%
Total	$	2,869,982	100.0	%	$	2,604,038	100.0	%	$	2,020,334	100.0	%

Contracts Exceeding 10% Of Revenue From External Customers

The following table includes contracts that exceeded 10% of our revenues for the years ended December 31, 2011, 2010 and 2009 (dollars in thousands):

	Year Ended December 31,
	2011				2010				2009
Revenues:
U.S. Army contract A	$	487,615	17.0	%	$	318,615	12.2	%	$	407,656	20.2	%
All other contracts	2,382,367		83.0	%	2,285,423		87.8	%	1,612,678		79.8	%
Total	$	2,869,982	100.0	%	$	2,604,038	100.0	%	$	2,020,334	100.0	%

Contracts Exceeding 10% Of Operating Income From External Customers

The following table includes contracts that exceeded 10% of our operating income for the years ended December 31, 2011, 2010 and 2009 (dollars in thousands):

	Year Ended December 31,
	2011				2010				2009
Operating income:
U.S. Army contract A	$	39,432	17.3	%	$	22,748	10.6	%	$	21,077	11.8	%
All other contracts	187,922		82.7	%	192,392		89.4	%	158,002		88.2	%
Total	$	227,354	100.0	%	$	215,140	100.0	%	$	179,079	100.0	%

Contracts Exceeding 10% Of Receivables

The following table includes contracts that exceeded 10% of our receivables, net at December 31, 2011 and 2010 (dollars in thousands):

	December 31,
	2011				2010
Receivables, net:
U.S. Army contract A	$	88,359	16.3	%	$	25,357	4.8	%
U.S. Army contract B	59,309		11.0	%	6,778		1.3	%
All other contracts	392,800		72.7	%	496,630		93.9	%
Total	$	540,468	100.0	%	$	528,765	100.0	%