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 Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Common Class A      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]      
Common Stock, Capital Shares Reserved for Future Issuance 2,400,000    
Common Class B      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]      
Outstanding options, Ending Balance 0    
Common Class C      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]      
Options granted 2,500,000    
Common Stock, Capital Shares Reserved for Future Issuance 10,600,000    
Employee Stock Option | Common Class A      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]      
Outstanding options, Beginning Balance 3,207,000    
Options exercised (845,000)    
Options forfeited/cancelled (2,000)    
Outstanding options, Ending Balance 2,360,000 3,207,000  
Exercisable options 2,264,000    
Outstanding WAEP, Beginning of period $ 23.21    
WAEP exercised 22.77    
Forfeited/Canelled, WAEP 32.20    
Outstanding WAEP, End of period 23.36 $ 23.21  
Exercisable WAEP $ 23.24    
Employee Stock Option | Common Class C      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]      
Outstanding options, Beginning Balance 9,833,000    
Options granted 2,476,000    
Options exercised (1,691,000)    
Options forfeited/cancelled (5,000)    
Outstanding options, Ending Balance 10,613,000 9,833,000  
Exercisable options 4,598,000    
Outstanding WAEP, Beginning of period $ 26.71    
WAEP granted 38.29    
WAEP exercised 22.47    
Forfeited/Canelled, WAEP 31.95    
Outstanding WAEP, End of period 30.09 $ 26.71  
Exercisable WAEP $ 22.96    
Employee Stock Option | 2013 Plan | Common Class A      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]      
Options granted   1,000 23,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term 3 years 3 months 18 days    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term 3 years 1 month 6 days    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value $ 37    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value $ 36    
Employee Stock Option | 2013 Plan | Common Class C      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]      
Options granted 2,476,000 3,359,000  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term 5 years    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term 3 years 2 months 12 days    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value $ 86    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value $ 70