Segment and Related Information, Revenue By Major Customer (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenue, Major Customer [Line Items]
Percentage of revenue generated by customer	100.00%	100.00%	100.00%	100.00%
Hospitality segment [Member] | McDonald's Corporation [Member] | Reportable Segments [Member]
Revenue, Major Customer [Line Items]
Percentage of revenue generated by customer	20.00%	21.00%	21.00%	18.00%
Hospitality segment [Member] | Yum! Brands, Inc. [Member] | Reportable Segments [Member]
Revenue, Major Customer [Line Items]
Percentage of revenue generated by customer	11.00%	11.00%	11.00%	14.00%
Government segment [Member] | U.S. Department of Defense [Member] | Reportable Segments [Member]
Revenue, Major Customer [Line Items]
Percentage of revenue generated by customer	38.00%	38.00%	39.00%	40.00%
All Others [Member]
Revenue, Major Customer [Line Items]
Percentage of revenue generated by customer	31.00%	30.00%	29.00%	28.00%