Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2014

Computation of Basic and Diluted Earnings per Share

	Three Months Ended
	March 31,
(in thousands, except per share data)	2014		2013
Net income attributable to common shareholders	$	48,684	$	57,791
Average basic shares outstanding	58,516		57,479
Effect of dilutive stock options	998		910
Average diluted shares outstanding	59,514		58,389
Earnings per basic share	$	0.83	$	1.01
Earnings per diluted share	$	0.82	$	0.99