Per Share Information (Tables)

12 Months Ended

Dec. 31, 2014

Earnings Per Share [Abstract]

Basic and Diluted Earnings Per Share

The amounts used to compute the basic and diluted earnings per share for the years ended December 31, 2014, 2013 and 2012 are illustrated below (in thousands):

	Year Ended December 31,
	2014			2013		2012
Amounts Attributable to Common Stock:
Net income from continuing operations	$	297,341		$	401,921	$	289,694
Net income (loss) from discontinued operations		(627	)		—		16,935
Net income attributable to common stock	$	296,714		$	401,921	$	306,629
Weighted Average Shares:
Weighted average shares outstanding for basic earnings per share		219,668			214,929		212,777
Effect of dilutive stock options		22			49		58
Weighted average shares outstanding for diluted earnings per share		219,690			214,978		212,835