Segment and Related Information, Revenue By Major Customer (Details)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenue, Major Customer [Line Items]
Percentage of revenue generated by customer	100.00%	100.00%
All Others [Member]
Revenue, Major Customer [Line Items]
Percentage of revenue generated by customer	32.00%	31.00%
Reportable Segments [Member] | Hospitality segment [Member] | McDonald's Corporation [Member]
Revenue, Major Customer [Line Items]
Percentage of revenue generated by customer	17.00%	18.00%
Reportable Segments [Member] | Hospitality segment [Member] | Yum! Brands, Inc. [Member]
Revenue, Major Customer [Line Items]
Percentage of revenue generated by customer	12.00%	8.00%
Reportable Segments [Member] | Government segment [Member] | U.S. Department of Defense [Member]
Revenue, Major Customer [Line Items]
Percentage of revenue generated by customer	39.00%	43.00%