Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation (Details)

v3.3.1.900
Stock-Based Compensation (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended 24 Months Ended
Dec. 31, 2015
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2015
Class A common stock        
Options        
Common Stock, Capital Shares Reserved for Future Issuance 630,000 630,000   630,000
Class C common stock        
Options        
Common Stock, Capital Shares Reserved for Future Issuance 2,800,000 2,800,000   2,800,000
Options        
Options        
Aggregate intrinsic value exercises   $ 11.2 $ 1.8  
Unrecognized compensation cost options $ 20.0 $ 20.0   $ 20.0
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 2 years 6 months      
Common Stock, Capital Shares Reserved for Future Issuance 3,400,000 3,400,000   3,400,000
2014 Plan | Awards        
Stock Based Compensation        
Number of authorized shares 8,400,000 8,400,000   8,400,000
Fair value assumptions        
Dividend rate       0.00%
2014 Plan | Awards | Class A common stock        
Options        
Outstanding beginning balance (in shares)   807,000    
Exercised (in shares)   (176,000)    
Forfeited/Cancelled (in shares)   (1,000)    
Outstanding ending balance (in shares) 630,000 630,000 807,000 630,000
Number of awards exercisable (in shares) 606,000 606,000   606,000
WAEP Outstanding beginning balance (in dollars per share)   $ 32.21    
WAEP options exercised (in dollars per share)   31.67    
WAEP options forfeited/cancelled (in dollars per share)   37.11    
WAEP Outstanding ending balance (in dollars per share) $ 32.36 32.36 $ 32.21 $ 32.36
WAEP options exercisable (in dollars per share) $ 32.20 $ 32.20   $ 32.20
Weighted average remaining contractual life outstanding 3 years 2 months 12 days      
Weighted average remaining contractual life exercisable 3 years 1 month 6 days      
Aggregate intrinsic value outstanding $ 12.0 $ 12.0   $ 12.0
Aggregate intrinsic value exercisable $ 12.0 $ 12.0   $ 12.0
2014 Plan | Awards | Class C common stock        
Options        
Outstanding beginning balance (in shares)   3,137,000    
Options granted (in shares)   21,000    
Exercised (in shares)   (395,000)    
Forfeited/Cancelled (in shares)   (2,000)    
Outstanding ending balance (in shares) 2,761,000 2,761,000 3,137,000 2,761,000
Number of awards exercisable (in shares) 1,184,000 1,184,000   1,184,000
WAEP Outstanding beginning balance (in dollars per share)   $ 39.85    
WAEP Options granted (in dollars per share)   51.24    
WAEP options exercised (in dollars per share)   31.80    
WAEP options forfeited/cancelled (in dollars per share)   37.09    
WAEP Outstanding ending balance (in dollars per share) $ 41.09 41.09 $ 39.85 $ 41.09
WAEP options exercisable (in dollars per share) $ 32.17 $ 32.17   $ 32.17
Weighted average remaining contractual life outstanding 6 years 4 months 24 days      
Weighted average remaining contractual life exercisable 3 years 1 month 6 days      
Aggregate intrinsic value outstanding $ 30.0 $ 30.0   $ 30.0
Aggregate intrinsic value exercisable $ 23.0 $ 23.0   $ 23.0
2014 Plan | Options | Class A common stock        
Options        
Options granted (in shares)   0    
2014 Plan | Options | Class B common stock        
Options        
Outstanding ending balance (in shares) 0 0   0
2014 Plan | Options | Class C common stock        
Options        
Options granted (in shares)   21,000    
2014 Plan | Options | Class C common stock | Tranche One        
Stock Based Compensation        
Vesting period   1 year    
Weighted average grant date fair value (in dollars per share) $ 13.28 $ 13.28   $ 13.28
Options        
Options granted (in shares)   18,000    
2014 Plan | Options | Class C common stock | Tranche Two        
Stock Based Compensation        
Vesting period   2 years    
Weighted average grant date fair value (in dollars per share) $ 15.03 $ 15.03   $ 15.03
Options        
Options granted (in shares)   3,000    
2014 Plan | Minimum | Awards        
Stock Based Compensation        
Vesting period   4 years    
Term of awards   7 years    
Fair value assumptions        
Expected term       4 years 7 months 6 days
Volatility rate       27.40%
2014 Plan | Maximum | Awards        
Stock Based Compensation        
Vesting period   5 years    
Term of awards   10 years    
Fair value assumptions        
Expected term       7 years 3 months 18 days
Volatility rate       28.50%