CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid In Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock
Beginning Balance at Dec. 31, 2016					$ (438,717)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 40,170
Other comprehensive income	49,600
Ending Balance at Apr. 02, 2017					(389,117)
Beginning Balance (in shares) at Dec. 31, 2017		46,871				1,704
Beginning Balance at Dec. 31, 2017	2,430,531	$ 46,871	$ 591,721	$ 2,285,886	(265,091)	$ (228,856)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	56,184			56,184
Cash dividends ($0.34 per share)	(15,447)			(15,447)
Other comprehensive income	82,690				82,690
Settlements of note hedges associated with convertible notes and warrants (in shares)						(132)
Settlements of note hedges associated with convertible notes and warrants	(12)		(17,884)			$ 17,872
Shares issued under compensation plans (in shares)		(97)				(43)
Shares issued under compensation plans	4,122	$ 97	992			$ 3,033
Deferred compensation (in shares)						(8)
Deferred compensation	322					$ 322
Ending Balance (in shares) at Apr. 01, 2018		46,968				1,521
Ending Balance at Apr. 01, 2018	$ 2,560,500	$ 46,968	$ 574,829	$ 2,328,733	$ (182,401)	$ (207,629)