• Filing Date: 2014-03-12
  • Form Type: 10-K
  • Description: Annual report
v2.4.0.8
Stock-Based Compensation - Assumptions Used to Determine the Fair Value of the Awards with Market-Based (Detail) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Share Based Compensation Arrangement by Share Based Payment Award Fair Value Assumptions and Methodology [Line Items]    
Expected dividends per share $ 0.90 $ 0.80
Expected volatility, minimum 41.50% 36.70%
Expected volatility, maximum 51.60% 50.00%
Risk-free interest rate, minimum 0.00% 0.10%
Risk-free interest rate, maximum 1.90% 1.20%
Estimated cost of capital, minimum 9.30% 11.90%
Estimated cost of capital, maximum 10.30% 12.10%
Expected life (in years) 5 years  
Minimum [Member]
   
Share Based Compensation Arrangement by Share Based Payment Award Fair Value Assumptions and Methodology [Line Items]    
Expected life (in years) 4 years 6 years
Maximum [Member]
   
Share Based Compensation Arrangement by Share Based Payment Award Fair Value Assumptions and Methodology [Line Items]    
Expected life (in years) 6 years