XML 105 R98.htm IDEA: XBRL DOCUMENT v2.4.0.6
Stock-Based Compensation - Additional Information (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares granted 149,720 173,553 121,923  
Restricted stock units outstanding 53,272 42,938 29,872  
Unvested restricted shares outstanding 391,700 327,000 237,150 203,250
Directors Restricted Stock
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares granted 9,720 6,303 9,423  
Shares grant price 43.74 40.45 30.85  
Shares aggregate grant price 425 255 291  
Unvested restricted shares outstanding 0 0 0 0
Performance Shares
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares granted 80,000      
Shares aggregate grant price 3,900      
Contractual period 3 years      
Performance Shares | Minimum
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares grant price 48.72      
Performance shares target distribution 0      
Performance Shares | Maximum
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares grant price 49.09      
Performance shares target distribution 160,000      
Stock Options | Torchmark Corporation 2011 Incentive Plan | Director
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 6 months      
Stock Options | Torchmark Corporation 2011 Incentive Plan | Employees | Seven Year Grants | One-Half
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 2 years      
Stock Options | Torchmark Corporation 2011 Incentive Plan | Employees | Seven Year Grants | One-Half
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 3 years      
Stock Options | Torchmark Corporation 2011 Incentive Plan | Employees | Ten Year Grants | One-Fourth
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 2 years      
Stock Options | Torchmark Corporation 2011 Incentive Plan | Employees | Ten Year Grants | One-Fourth
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 3 years      
Stock Options | Torchmark Corporation 2011 Incentive Plan | Employees | Ten Year Grants | One-Fourth
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 4 years      
Stock Options | Torchmark Corporation 2011 Incentive Plan | Employees | Ten Year Grants | One-Fourth
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 5 years      
Stock Options | Previous Plan | Director
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 6 months      
Stock Options | Previous Plan | Employees | One-Half
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 2 years      
Stock Options | Previous Plan | Employees | One-Half
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 3 years      
Stock Options | Minimum
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Option contractual term 7 years      
Stock Options | Maximum
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Option contractual term 10 years