Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Jan. 01, 2017	Jan. 03, 2016
Revenue
Product revenue	$ 1,477,414	$ 1,396,896	$ 1,395,102
Service revenue	779,568	718,621	709,721
Total revenue	2,256,982	2,115,517	2,104,823
Cost of product revenue	708,685	664,803	696,461
Cost of service revenue	475,266	437,361	444,131
Selling, general and administrative expenses	616,167	600,885	587,219
Research and development expenses	139,404	124,278	112,539
Restructuring and contract termination charges, net	12,657	5,124	13,547
Operating income from continuing operations	304,803	283,066	250,926
Interest and other expense, net	8,085	38,998	42,119
Income from continuing operations before income taxes	296,718	244,068	208,807
Provision for income taxes	139,828	28,362	20,022
Income from continuing operations	156,890	215,706	188,785
Income from discontinued operations before income taxes	650	22,229	35,205
Gain (loss) on disposition of discontinued operations before income taxes	179,615	619	(28)
Provision for income taxes on discontinued operations and dispositions	44,522	4,255	11,537
Income from discontinued operations and dispositions	135,743	18,593	23,640
Net income	$ 292,633	$ 234,299	$ 212,425
Basic earnings per share:
Income from continuing operations	$ 1.43	$ 1.97	$ 1.68
Income from discontinued operations and dispositions	1.24	0.17	0.21
Net income	2.67	2.14	1.89
Diluted earnings per share:
Income from continuing operations	1.42	1.96	1.67
Income from discontinued operations and dispositions	1.22	0.17	0.21
Net income	$ 2.64	$ 2.12	$ 1.87