Summary of Significant Accounting Policies Products and Services (Details)	3 Months Ended		6 Months Ended
	Jun. 28, 2013	Jun. 29, 2012	Jun. 28, 2013	Jun. 29, 2012
Product Information [Line Items]
Total revenue	100.00%	100.00%	100.00%	100.00%
IT solutions [Member]
Product Information [Line Items]
Total revenue	40.00%	41.00%	39.00%	40.00%
IT staffing [Member]
Product Information [Line Items]
Total revenue	60.00%	59.00%	61.00%	60.00%