Segment and Related Information, Revenue By Major Customer (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Revenue, Major Customer [Line Items]
Percentage contributed in revenue by customers, minimum (in hundredths)			100.00%
Hospitality segment [Member] | McDonald's Corporation [Member]
Revenue, Major Customer [Line Items]
Percentage contributed in revenue by customers, minimum (in hundredths)	19.00%	28.00%	18.00%	30.00%
Hospitality segment [Member] | Yum! Brands, Inc. [Member]
Revenue, Major Customer [Line Items]
Percentage contributed in revenue by customers, minimum (in hundredths)	14.00%	13.00%	14.00%	12.00%
Government segment [Member] | U.S. Department of Defense [Member]
Revenue, Major Customer [Line Items]
Percentage contributed in revenue by customers, minimum (in hundredths)	42.00%	29.00%	39.00%	30.00%
All Others [Member]
Revenue, Major Customer [Line Items]
Percentage contributed in revenue by customers, minimum (in hundredths)	25.00%	30.00%	29.00%	28.00%