Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Sep. 30, 2017	Oct. 01, 2016
Net income	$ 40,902	$ 21,947	$ 113,407	$ 71,049
Other comprehensive income, net of tax
Foreign currency translation adjustments	(279)	10,512	11,805	17,276
Reclassification of cumulative translation adjustment associated with planned sale of subsidiary	1,400	0	1,400	0
Unrealized loss on available-for-sale securities	0	0	0	(611)
Pension liability adjustments	16	16	23	47
Other comprehensive income	1,137	10,528	13,228	16,712
Comprehensive income	$ 42,039	$ 32,475	$ 126,635	$ 87,761