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Net Income Per Share
 9 Months Ended
Sep. 30, 2012
Earnings Per Share [Abstract]  
Net Income Per Share
Net Income per Share

Net income per share was determined by dividing adjusted net income to shareholders by the applicable weighted average shares outstanding. 

 
Quarter Ended September 30,
 
Nine Months Ended September 30,
(in thousands, except per share amounts)
2012
 
2011
 
2012
 
2011
Net income to shareholders
$
49,653

 
$
53,264

 
$
196,593

 
$
91,850

Less: Adjustment of redeemable noncontrolling interests
(1,702
)
 
—

 
6,484

 
—

Adjusted net income to shareholders
$
51,355

 
$
53,264

 
$
190,109

 
$
91,850

 
 
 
 
 
 
 
 
Basic common shares outstanding
9,632

 
9,680

 
9,641

 
9,706

Dilutive potential common shares
27

 
38

 
26

 
40

Diluted shares outstanding
9,659

 
9,718

 
9,667

 
9,746

Basic net income per share
$
5.33

 
$
5.50

 
$
19.72

 
$
9.46

Diluted net income per share
$
5.32

 
$
5.48

 
$
19.67

 
$
9.42