Income Taxes (Schedule of Deferred Tax Assets and Deferred Tax Liabilities) (Details) - USD ($) $ in Thousands	Dec. 28, 2019	Dec. 29, 2018
Deferred tax assets:
Accrued expenses	$ 31,995	$ 31,273
Tax credits and separate return net operating losses	19,186	22,826
Share based compensation	52,643	60,901
Deferred Tax Assets, Lease Liability	29,939	0
Other	12,701	14,951
Gross deferred tax assets	146,464	129,951
Valuation Allowance	0	(1,404)
Total deferred tax assets	146,464	128,547
Deferred tax liabilities:
Software development costs	(247,217)	(229,624)
Depreciation and amortization	(171,267)	(131,516)
Prepaid expenses	(39,311)	(39,154)
Contract and service revenues and costs	(12,112)	(35,933)
Deferred Tax Liability, Lease Right-of-use Asset	(28,100)	0
Other	(10,549)	(6,199)
Total deferred tax liabilities	(508,556)	(442,426)
Net deferred tax liability	$ (362,092)	$ (313,879)