Segment and Related Information, Revenue By Major Customer (Details)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Revenue, Major Customer [Line Items]
Percentage contributed in revenue by customers, minimum (in hundredths)	10.00%
Percentage of revenue generated by customer (in hundredths)	100.00%	100.00%
Hospitality segment [Member] | McDonald's Corporation [Member]
Revenue, Major Customer [Line Items]
Percentage of revenue generated by customer (in hundredths)	20.00%	29.00%
Hospitality segment [Member] | Yum! Brands, Inc. [Member]
Revenue, Major Customer [Line Items]
Percentage of revenue generated by customer (in hundredths)	15.00%	13.00%
Government segment [Member] | U.S. Department of Defense [Member]
Revenue, Major Customer [Line Items]
Percentage of revenue generated by customer (in hundredths)	36.00%	30.00%
All Others [Member]
Revenue, Major Customer [Line Items]
Percentage of revenue generated by customer (in hundredths)	29.00%	28.00%