Consolidated Statements Of Shareholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Series A Preferred Stock [Member]	Series E Preferred Stock [Member]	Preferred Stock [Member]	Preferred Stock [Member] Series E Preferred Stock [Member]	Common Stock [Member]	Paid-In Capital [Member]	Retained Earnings [Member]	Retained Earnings [Member] Series A Preferred Stock [Member]	Retained Earnings [Member] Series E Preferred Stock [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interest [Member]
Beginning Balance at Dec. 31, 2010	$ 1,778,879			$ 28,939		$ 907	$ 1,160,690	$ 741,870			$ (149,462)	$ (13,709)	$ 9,644
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	151,378							151,379					(1)
Other comprehensive income (loss)	(46,495)											(46,495)
Dividends declared on common stock of $0.16, $0.35 and $0.55 per share during 2011, 2012 and 2013, respectively	(13,978)							(13,978)
Dividends declared on preferred stock $85.00 per share on Series A for 2011, 2012 and 2013 and $1,648.89 for Series E in 2012		(2,460)							(2,460)
Subsidiary preferred stock dividends $0.8265 per share during 2011	(826)							(826)
Redemption of subsidiary preferred stock	(9,577)												(9,577)
Dissolution of joint venture	(66)												(66)
Common stock warrants repurchased	(16,285)						(16,285)
Exercise of stock options	213						(371)				584
Net shares acquired related to employee share-based compensation plans	(1,670)						3				(1,673)
Stock-based compensation, net of tax effects	5,972						1,014	(10,233)			15,191
Issuance of stock	689						295	(325)			719
Ending Balance at Dec. 31, 2011	1,845,774			28,939		907	1,145,346	865,427			(134,641)	(60,204)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	173,697							173,697
Other comprehensive income (loss)	27,938											27,938
Dividends declared on common stock of $0.16, $0.35 and $0.55 per share during 2011, 2012 and 2013, respectively	(30,667)							(30,667)
Dividends declared on preferred stock $85.00 per share on Series A for 2011, 2012 and 2013 and $1,648.89 for Series E in 2012		(2,460)							(2,460)
Repurchase of 2,518,891 common shares	(50,000)										(50,000)
Common stock warrants repurchased	(388)						(388)
Exercise of stock options	996						(1,988)				2,984
Net shares acquired related to employee share-based compensation plans	(3,243)										(3,243)
Stock-based compensation, net of tax effects	8,613						2,090	(5,570)			12,093
Issuance of stock	560		122,710		122,710		560
Ending Balance at Dec. 31, 2012	2,093,530			151,649		907	1,145,620	1,000,427			(172,807)	(32,266)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	179,549							179,549
Other comprehensive income (loss)	(16,283)											(16,283)
Dividends declared on common stock of $0.16, $0.35 and $0.55 per share during 2011, 2012 and 2013, respectively	(48,952)							(48,952)
Dividends declared on preferred stock $85.00 per share on Series A for 2011, 2012 and 2013 and $1,648.89 for Series E in 2012		(2,460)	(8,343)						(2,460)	(8,343)
Common stock warrants repurchased	(30)						(30)
Exercise of stock options	2,736						(2,101)				4,837
Net shares acquired related to employee share-based compensation plans	(672)										(672)
Stock-based compensation, net of tax effects	9,382						2,832	(3,477)			10,027
Issuance of stock	731					27	(20,737)	(36,256)			57,697
Ending Balance at Dec. 31, 2013	$ 2,209,188			$ 151,649		$ 934	$ 1,125,584	$ 1,080,488			$ (100,918)	$ (48,549)	$ 0