Segment and Related Information, Revenue By Major Customer (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenue, Major Customer [Line Items]
Percentage of revenue generated by customer	100.00%	100.00%	100.00%	100.00%
All Others [Member]
Revenue, Major Customer [Line Items]
Percentage of revenue generated by customer	29.00%	25.00%	30.00%	28.00%
Reportable Segments [Member] | Hospitality segment [Member] | McDonald's Corporation [Member]
Revenue, Major Customer [Line Items]
Percentage of revenue generated by customer	24.00%	24.00%	21.00%	21.00%
Reportable Segments [Member] | Hospitality segment [Member] | Yum! Brands, Inc. [Member]
Revenue, Major Customer [Line Items]
Percentage of revenue generated by customer	10.00%	14.00%	11.00%	11.00%
Reportable Segments [Member] | Government segment [Member] | U.S. Department of Defense [Member]
Revenue, Major Customer [Line Items]
Percentage of revenue generated by customer	37.00%	37.00%	38.00%	40.00%