Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
Apr. 04, 2015	Mar. 29, 2014
Revenues:
System sales	$ 259,569us-gaap_SalesRevenueGoodsNet	$ 206,687us-gaap_SalesRevenueGoodsNet
Support, maintenance and services	718,370us-gaap_SalesRevenueServicesNet	557,429us-gaap_SalesRevenueServicesNet
Reimbursed travel	18,150us-gaap_ReimbursementRevenue	20,645us-gaap_ReimbursementRevenue
Total revenues	996,089us-gaap_SalesRevenueNet	784,761us-gaap_SalesRevenueNet
Costs and expenses:
Cost of system sales	91,499us-gaap_CostOfGoodsSold	65,113us-gaap_CostOfGoodsSold
Cost of support, maintenance and services	59,011us-gaap_CostOfServices	43,341us-gaap_CostOfServices
Cost of reimbursed travel	18,150us-gaap_CostOfReimbursableExpense	20,645us-gaap_CostOfReimbursableExpense
Sales and client service	420,182cern_SalesAndClientServicesExpense	330,901cern_SalesAndClientServicesExpense
Software development (Includes amortization of $29,089 and $25,101, respectively)	127,271	91,545
General and administrative	113,064us-gaap_GeneralAndAdministrativeExpense	55,213us-gaap_GeneralAndAdministrativeExpense
Total costs and expenses	829,177us-gaap_CostsAndExpenses	606,758us-gaap_CostsAndExpenses
Operating earnings	166,912us-gaap_OperatingIncomeLoss	178,003us-gaap_OperatingIncomeLoss
Other income, net	208us-gaap_NonoperatingIncomeExpense	2,990us-gaap_NonoperatingIncomeExpense
Earnings before income taxes	167,120	180,993
Income taxes	(56,186)us-gaap_IncomeTaxExpenseBenefit	(61,467)us-gaap_IncomeTaxExpenseBenefit
Net earnings	$ 110,934us-gaap_NetIncomeLoss	$ 119,526us-gaap_NetIncomeLoss
Basic earnings per share	$ 0.32us-gaap_EarningsPerShareBasic	$ 0.35us-gaap_EarningsPerShareBasic
Diluted earnings per share	$ 0.32us-gaap_EarningsPerShareDiluted	$ 0.34us-gaap_EarningsPerShareDiluted
Basic weighted average shares outstanding	343,216	343,701
Diluted weighted average shares outstanding	351,659	352,230

Sales and client service expenses include salaries of sales and client service personnel, depreciation and other expenses associated with our managed service business, communications expenses, unreimbursed travel expenses, expense for share-based payments, sales and marketing salaries and trade show and advertising costs.

No definition available.