Segment and Related Information, Revenue By Major Customer (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenue, Major Customer [Line Items]
Percentage of revenue generated by customer (in hundredths)	100.00%	100.00%	100.00%	100.00%
Hospitality segment [Member] | McDonald's Corporation [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Percentage of revenue generated by customer (in hundredths)	20.00%	25.00%	17.00%	19.00%
Hospitality segment [Member] | Yum! Brands, Inc. [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Percentage of revenue generated by customer (in hundredths)	10.00%	11.00%	13.00%	14.00%
Government segment [Member] | U.S. Department of Defense [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Percentage of revenue generated by customer (in hundredths)	36.00%	33.00%	37.00%	37.00%
All Others [Member]
Revenue, Major Customer [Line Items]
Percentage of revenue generated by customer (in hundredths)	34.00%	31.00%	33.00%	30.00%