Net Income (Loss) Per Share (Tables)

12 Months Ended

Dec. 31, 2012

Disclosure - Net (Loss) Income Per Share [Abstract]

Schedule Of Net Income Per Share Table [Text Block]

			2012		2011		2010
Numerator:
	Net income (loss)		$	1,134,514	$	(520,291)	$	852,552
	Less: preferred dividends			(61,622)		(47,020)		(34,525)
	Net income (loss) available to common shareholders		$	1,072,892	$	(567,311)	$	818,027
Denominator:
	Weighted number of common shares outstanding - basic			62,916.0		67,558.7		76,839.5
	Share options and other (1)			699.7		0		1,394.8
	Weighted average number of common shares and
		common share equivalents outstanding - diluted		63,615.7		67,558.7		78,234.3
Basic net income (loss) per share			$	17.05	$	(8.40)	$	10.65
Diluted net income (loss) per share(1)			$	16.87	$	(8.40)	$	10.46

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(1)At December 31, 2012, 2011 and 2010, share based awards to purchase 554.7 thousand, 2,854.4 thousand and 489.7 thousand common shares, respectively, were excluded from the calculation of diluted weighted average number of common shares and common share equivalents outstanding because their exercise prices were greater than the average market price of the common shares. In addition, dilutive securities, in the form of share options and other, of 687.3 thousand shares were not included in the weighted average number of common shares and common share equivalents outstanding for the purpose of computing the diluted net loss per share because to do so would have been anti-dilutive for year ended December 31, 2011.