Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2012

Earnings Per Share [Abstract]

Comparison Of Basic And Diluted Earnings Per Share

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2012		2011		2012		2011
Basic earnings (loss) per share:
Net income (loss)	$	219,647	$	(10,972)	$	534,154	$	91,448
Weighted average common shares outstanding		35,652,768		38,110,368		36,379,514		38,078,116
Basic earnings (loss) per share	$	6.16	$	(0.29)	$	14.68	$	2.40

		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2012		2011		2012		2011
Diluted earnings (loss) per share:
Net income (loss)		$	219,647	$	(10,972)	$	534,154	$	91,448
Weighted average common shares outstanding			35,652,768		38,110,368		36,379,514		38,078,116
Share equivalents:
Warrants and options			461,373		0		429,393		413,228
RSUs and long-term incentive plan ("LTIP") awards			501,633		0		583,226		1,267,221
Employee stock purchase plan			960		0		960		1,215
Weighted average common shares and common share equivalents
	outstanding - diluted		36,616,734		38,110,368		37,393,093		39,759,780
Diluted earnings (loss) per share		$	6.00	$	(0.29)	$	14.28	$	2.30