Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans - Additional Information (Details)

v3.10.0.1
Employee Benefit Plans - Additional Information (Details)
12 Months Ended
Dec. 31, 2018
USD ($)
Employer
Plans
Members
shares
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Jun. 30, 2017
shares
Jun. 30, 2015
shares
Jun. 30, 2012
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of active stock compensation plans | Plans 3          
Restricted stock shares | shares 704,000          
Number of employers obligated to make contribution under multiemployer plan | Employer 199          
Number of employee increase / (decrease) under multiemployer benefit percentage (1.00%) 0.50%        
Total contributions of multi employer Plan   5.00%        
SERP            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Members of senior management | Members 12          
Options | Selling, general and administrative expenses            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Compensation expense | $ $ 0 $ 0 $ 0      
Restricted stock units and restricted stock awards            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Tax benefit recognized | $ 3,000,000.0 4,200,000 4,200,000      
Restricted stock units and restricted stock awards | Selling, general and administrative expenses            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Compensation expense | $ 11,900,000 11,100,000 11,200,000      
Restricted stock units and restricted stock awards            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Compensation expense not yet recognized | $ $ 32,700,000          
Total compensation cost related to non-vested options expected to be recognized over weighted average period 6 years 10 months 24 days          
401(k) plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Employer contribution | $ $ 9,200,000 $ 8,000,000.0 $ 8,000,000.0      
2012 Formula Plan | Restricted stock awards | Board of Directors            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Restricted stock shares | shares 40,000          
2012 Formula Plan | Class A common stock            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of shares authorized | shares       500,000   300,000
2012 Plan | Restricted stock units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock award vesting period 3 years          
2012 Plan | Restricted stock units | Executive officers and other key associates            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Restricted stock shares | shares 664,000          
2012 Plan | Class A common stock            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of shares authorized | shares         4,000,000 2,000,000
2012 Formula Plan and 2004 Plan | Class A common stock | Options            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock option expiration period 10 years          
2012 Formula Plan and 2004 Plan | Class A common stock | Options | Minimum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock award vesting period 6 months          
2012 Formula Plan and 2004 Plan | Class A common stock | Options | Maximum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock award vesting period 3 years          
2012 Formula Plan and 2004 Plan | Class A common stock | Restricted stock awards and restricted stock units | Minimum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock award vesting period 1 year          
2012 Formula Plan and 2004 Plan | Class A common stock | Restricted stock awards and restricted stock units | Maximum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock award vesting period 3 years