Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016
Net income	$ 48,638	$ 27,152	$ 87,530	$ 46,441
Other comprehensive income (loss):
Pension liability adjustments (net of tax of $23 and $32 for the three months ended 2017 and 2016, and $55 and $365 for the six months ended 2017 and 2016, respectively)	(19)	(137)	(200)	(45)
Pension and postemployment reclassification adjustments	(80)	71	(181)	144
Unrealized gain (loss) on investments	(472)	(252)	475	(1,486)
Foreign currency translation adjustments	(3,582)	(14,935)	1,380	(3,180)
Comprehensive income	$ 44,485	$ 11,899	$ 89,004	$ 41,874