Annual report pursuant to Section 13 and 15(d)

Share Based Compensation - Summary of Activity Under all Share-Based Compensation Plans (Parenthetical) (Detail)

v2.4.0.6
Share Based Compensation - Summary of Activity Under all Share-Based Compensation Plans (Parenthetical) (Detail)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding SARs with market and performance conditions 11,333 11,169
Exercisable SARs with market and performance conditions 5,751  
Market condition awards [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding SARs with market and performance conditions 1,500 1,500
Exercisable SARs with market and performance conditions 1,500  
Market and performance condition awards [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding SARs with market and performance conditions 900 900