Unaudited Condensed Consolidated Statements of Shareholders' Equity (USD $) In Thousands	Total	Common shares	Preferred shares	Additional paid-in capital	Accumulated other comprehensive income (loss)	Retained earnings	Common shares held in treasury
Balance at beginning of period at Dec. 31, 2009		$ 82,586	$ 20,800	$ 3,357,004	$ 84,927	$ 4,100,782	$ (372)
Net (loss) income	270,581					270,581
Dividends on common shares						(79,345)
Dividends on preferred shares	(17,263)					(17,263)
Issuance of common shares		629		30,331
Issuance of preferred shares			0	0
Change in currency translation adjustment	(174,078)				(174,078)
Change in other accumulated comprehensive loss, net of tax	(5,254)				(5,254)
Repurchase of common shares							(600,086)
Balance at end of period at Jun. 30, 2010	7,071,242	83,215	20,800	3,387,335	(94,405)	4,274,755	(600,458)
Balance at beginning of period at Dec. 31, 2010	7,206,919	84,033	20,800	3,419,864	4,056	4,761,178	(1,083,012)
Net (loss) income	(682,771)					(682,771)
Dividends on common shares						(77,746)
Dividends on preferred shares	(17,263)					(17,263)
Issuance of common shares		536		25,421
Issuance of preferred shares			14,950	346,772
Change in currency translation adjustment	44,084				44,084
Change in other accumulated comprehensive loss, net of tax	(2,155)				(2,155)
Repurchase of common shares							(226,703)
Balance at end of period at Jun. 30, 2011	$ 6,632,044	$ 84,569	$ 35,750	$ 3,792,057	$ 45,985	$ 3,983,398	$ (1,309,715)