Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2013

Earnings Per Share [Abstract]

Schedule Of Net Income Attributable To Common Stockholders

	Year Ended December 31,
	2013			2012			2011
Net income	$	610,425		$	385,555		$	258,966
Less:
Net income attributable to participating securities	(2,562		)	(2,160		)	(2,310		)
Net income attributable to common shareholders	$	607,863		$	383,395		$	256,656

Reconciliation Of Denominator For Basic And Diluted Earnings (Loss) Per Share

The following table reconciles the denominator for the basic and diluted earnings per share computations shown in the consolidated statements of operations:

	Year Ended December 31,
	2013		2012		2011
Weighted average common shares—basic	66,612,128		66,289,429		65,927,421
Plus incremental shares from:
Assumed exercise of options	277,497		352,066		372,737
Weighted average common shares—diluted	66,889,625		66,641,495		66,300,158
Earnings per share:
Basic	$	9.13	$	5.78	$	3.89
Diluted	$	9.09	$	5.75	$	3.87