Condensed Consolidated Stockholders' Equity Statement (Unaudited) - 6 months ended Jul. 01, 2018 - 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, 2017		52	50,335			(8,316)
Beginning balance at Dec. 31, 2017	$ 1,434,866	$ 1	$ 503	$ 1,123,832	$ 833,610	$ (425,685)	$ (98,026)	$ 631
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of change in accounting principles	(29,041)				(29,041)
Net income (loss)	31,362				31,487			(125)
Other comprehensive income, net of tax	29,619						29,620	(1)
Exercise of stock options, net of tax withholding forfeitures	(405)			(416)		$ 11
Exercise of stock options, net of tax withholding forfeitures (in shares)						9
Conversion of restricted stock units into common stock, net of tax withholding forfeitures	(1,174)			(1,794)		$ 620
Conversion of restricted stock units into common stock, net of tax withholding forfeitures (in shares)						46
Share repurchase program	$ (100,000)					$ (100,000)
Share repurchase program (in shares)	(1,400)					(1,438)
Share-based compensation	$ 7,868			7,868
Redemption of stockholders' rights agreement	(411)				(411)
Preferred stock dividends	(17,466)				(17,466)
Common stock dividends ($0.10 per share)	(4,108)				(4,108)
Ending balance, shares at Jul. 01, 2018		52	50,335			9,699
Ending balance at Jul. 01, 2018	$ 1,351,110	$ 1	$ 503	$ 1,129,490	$ 814,071	$ (525,054)	$ (68,406)	$ 505