Condensed Consolidated Stockholders' Equity Statement (Unaudited) - 9 months ended Oct. 01, 2017 - USD ($) shares in Thousands, $ in Thousands	Total	Mandatory Convertible Preferred Stock	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Non-controlling Interest
Beginning balance, shares at Dec. 31, 2016		52	50,335			(8,155)
Beginning balance at Dec. 31, 2016	$ 1,461,317	$ 1	$ 503	$ 1,116,090	$ 783,812	$ (401,026)	$ (39,067)	$ 1,004
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	62,417				62,691			(274)
Foreign currency translation, net of $1.5 million tax	(46,478)						(46,446)	(32)
Adjustments to pension and postretirement liability, net of $0.7 million tax	1,171						1,171
Other comprehensive loss, net of tax	(45,307)
Exercise of stock options, net of tax withholding forfeitures	(1,696)			(1,628)		$ (68)
Exercise of stock options, net of tax withholding forfeitures (in shares)						34
Conversion of restricted stock units into common stock, net of tax withholding forfeitures	$ (3,727)			(4,270)		$ 543
Conversion of restricted stock units into common stock, net of tax withholding forfeitures (in shares)						97
Share repurchase program (in shares)	(200)					(151)
Share repurchase program	$ (11,508)					$ (11,508)
Share-based compensation	13,431			13,431
Preferred stock dividends	(26,198)				(26,198)
Common stock dividends ($0.15 per share)	(6,369)				(6,369)
Ending balance, shares at Oct. 01, 2017		52	50,335			(8,175)
Ending balance at Oct. 01, 2017	$ 1,442,360	$ 1	$ 503	$ 1,123,623	$ 813,936	$ (412,059)	$ (84,342)	$ 698