CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN TOTAL EQUITY (unaudited) - USD ($) $ in Thousands	Total		Common Shares	Capital in Excess of Stated Value	Accumulated Other Comprehensive Loss	Retained Earnings	Noncontrolling Interests
Beginning Balance at Dec. 31, 2018	$ 1,772,278		$ 7,175	$ 304,709	$ (740,913)	$ 2,188,115	$ 13,192
Beginning balance (shares) at Dec. 31, 2018			99,829,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	73,768					73,663	105
Other comprehensive income/(loss):
Translation loss	(2,972)				(2,852)		(120)
Defined benefit plan adjustment, net of tax	7,156				7,156
Derivative financial instruments, net of tax	1,864				1,864
Other comprehensive income/(loss)	6,048				6,168		(120)
Dividends	(41,534)					(41,534)
Dividends paid to noncontrolling interests	(214)						(214)
Issuance of stock awards	399			399
Issuance of stock awards (shares)			340,000
Shares repurchased	(7,395)			(7,395)
Shares repurchased (shares)			(133,000)
Stock-based compensation	4,560			4,560
Ending Balance at Mar. 31, 2019	1,801,139		$ 7,175	302,273	(734,745)	2,213,473	12,963
Ending balance (shares) at Mar. 31, 2019			100,036,000
Beginning Balance at Dec. 31, 2018	$ 1,772,278		$ 7,175	304,709	(740,913)	2,188,115	13,192
Beginning balance (shares) at Dec. 31, 2018			99,829,000
Other comprehensive income/(loss):
Shares repurchased (shares)	0
Ending Balance at Dec. 31, 2019	$ 1,815,705	[1]	$ 7,175	310,778	(816,803)	2,301,532	13,023
Ending balance (shares) at Dec. 31, 2019	100,198,000		100,198,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 80,236					80,445	(209)
Other comprehensive income/(loss):
Translation loss	(95,212)				(93,575)		(1,637)
Defined benefit plan adjustment, net of tax	5,780				5,780
Derivative financial instruments, net of tax	(4,555)				(4,555)
Other comprehensive income/(loss)	(93,987)				(92,350)		(1,637)
Dividends	(43,339)					(43,339)
Dividends paid to noncontrolling interests	0
Issuance of stock awards	376			376
Issuance of stock awards (shares)			196,000
Shares repurchased	$ (3,938)			(3,938)
Shares repurchased (shares)	0		(65,000)
Stock-based compensation	$ 597			597
Ending Balance at Mar. 29, 2020	$ 1,755,441		$ 7,175	$ 307,813	$ (909,153)	$ 2,338,429	$ 11,177
Ending balance (shares) at Mar. 29, 2020	100,329,000		100,329,000

[1] The year-end condensed consolidated balance sheet data was derived from audited financial statements, but does not include all disclosures required by accounting principles generally accepted in the United States of America.