Annual report pursuant to Section 13 and 15(d)

Stock Incentive Plan - Fair Value Assumptions (Details)

v2.4.0.8
Stock Incentive Plan - Fair Value Assumptions (Details) (Stock Options, USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Fair value significant assumptions:      
Future dividends $ 0 $ 0 $ 0
Expected volatility, minimum   32.00%  
Expected life   6 years 6 months  
Cliff vesting period 1 year    
Ratable vesting period 5 years    
Options ratable vesting frequency 1 year    
Minimum
     
Fair value significant assumptions:      
Risk-free interest rate, minimum 1.03% 0.82% 1.35%
Expected volatility, minimum 34.00%   32.00%
Expected life 6 years   6 years
Maximum
     
Fair value significant assumptions:      
Risk-free interest rate, maximum 2.18% 1.25% 2.58%
Expected volatility, minimum 52.00%    
Expected volatility, maximum     33.00%
Expected life 6 years 5 months   6 years 6 months