Consolidated Stockholders' Equity Statements - 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 (in shares) at Dec. 31, 2015		0	50,335			8,354
Beginning balance at Dec. 31, 2015	$ 825,523	$ 0	$ 503	$ 605,660	$ 679,716	$ (402,793)	$ (58,987)	$ 1,424
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	127,646				128,003			(357)
Other comprehensive income (loss), net of tax	19,857						19,920	(63)
Preferred stock issuance, net, (in shares)		52
Preferred stock issuance, net	501,498	$ 1		501,497
Exercise of stock options, net of tax withholding forfeitures	(4,088)			(4,205)		$ 117
Exercise of stock options, net of tax withholding forfeitures (in shares)						76
Conversion of restricted stock units into common stock, net of tax withholding forfeitures	(3,390)			(5,040)		$ 1,650
Conversion of restricted stock units into common stock, net of tax withholding forfeitures (in shares)						123
Share-based compensation	18,178			18,178
Preferred stock dividends	(15,428)				(15,428)
Common stock dividends ($0.20 per share)	(8,479)				(8,479)
Ending balance (in shares) at Dec. 31, 2016		52	50,335			8,155
Ending 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)	92,853				93,210			(357)
Other comprehensive income (loss), net of tax	(58,975)						(58,959)	(16)
Exercise of stock options, net of tax withholding forfeitures	(2,838)			(2,635)		$ (203)
Exercise of stock options, net of tax withholding forfeitures (in shares)						55
Conversion of restricted stock units into common stock, net of tax withholding forfeitures	(3,726)			(4,270)		$ 544
Conversion of restricted stock units into common stock, net of tax withholding forfeitures (in shares)						97
Share repurchase program	(25,000)					$ (25,000)
Share repurchase program (in shares)						(313)
Share-based compensation	14,647			14,647
Preferred stock dividends	(34,931)				(34,931)
Common stock dividends ($0.20 per share)	(8,481)				(8,481)
Ending balance (in shares) at Dec. 31, 2017		52	50,335			8,316
Ending 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)	160,711				160,894			(183)
Other comprehensive income (loss), net of tax	23,112						23,119	(7)
Exercise of stock options, net of tax withholding forfeitures	(765)			(883)		$ 118
Exercise of stock options, net of tax withholding forfeitures (in shares)						20
Conversion of restricted stock units into common stock, net of tax withholding forfeitures	(1,329)			(2,051)		$ 722
Conversion of restricted stock units into common stock, net of tax withholding forfeitures (in shares)						51
Share repurchase program	(175,000)					$ (175,000)
Share repurchase program (in shares)						(2,694)
Share-based compensation	18,497			18,497
Redemption of stockholders' rights agreement	(411)				(411)
Preferred stock dividends	(34,931)				(34,931)
Common stock dividends ($0.20 per share)	(8,121)				(8,121)
Ending balance (in shares) at Dec. 31, 2018		52	50,335			10,939
Ending balance at Dec. 31, 2018	$ 1,387,588	$ 1	$ 503	$ 1,139,395	$ 922,000	$ (599,845)	$ (74,907)	$ 441