Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans - Additional Information (Detail)

v3.8.0.1
Employee Benefit Plans - Additional Information (Detail)
3 Months Ended 12 Months Ended
Jun. 30, 2017
shares
Jun. 30, 2015
shares
Jun. 30, 2012
shares
Dec. 31, 2017
USD ($)
Plans
Members
Employer
shares
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Number of active stock compensation plans | Plans       3    
Restricted stock shares | shares       600,000    
Number of employers obligated to make contribution under multiemployer plan | Employer       201    
Pension Protection       2006 2006 2006
Number of employee increase / (decrease) under multiemployer benefit percentage       0.50% 2.60%  
Total contributions of multi employer Plan         5.00% 5.00%
Plans In Red Zone [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Multiemployer Benefit AI Pension Plan       Less than 65 percent    
Plans In Yellow Zone [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Multiemployer Benefit AI Pension Plan       Between 65 and less than 80 percent    
Plans In Green Zone [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Multiemployer Benefit AI Pension Plan       At least 80 percent    
Supplemental Employee Retirement Plans, Defined Benefit [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Members of senior management | Members       12    
Stock Option [Member] | Selling, General and Administrative Expenses [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Compensation expense | $       $ 0 $ 0 $ 0
Restricted Stock Units and Restricted Stock Awards [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Tax benefits recognized related to compensation expense | $       4,200,000 4,200,000 3,700,000
Restricted Stock Units and Restricted Stock Awards [Member] | Selling, General and Administrative Expenses [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Compensation expense | $       11,100,000 11,200,000 9,800,000
Non-vested Restricted Stock Units and Restricted Stock Awards [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Compensation expense not yet recognized | $       $ 34,200,000    
Total compensation cost related to non-vested options expected to be recognized over weighted average period       7 years 6 months    
401(k) plan [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Employer contribution | $       $ 8,000,000 $ 8,000,000 $ 7,700,000
2012 Formula Plan [Member] | Restricted Stock [Member] | Director [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Restricted stock shares | shares       40,000    
2012 Formula Plan [Member] | Common Class A [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Number of shares authorized | shares 500,000   300,000      
2012 Plan [Member] | Restricted Stock Units [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Stock award vesting period       3 years    
2012 Plan [Member] | Restricted Stock Units [Member] | Executive Officer and Other Key Associates [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Restricted stock shares | shares       560,000    
2012 Plan [Member] | Common Class A [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Number of shares authorized | shares   4,000,000 2,000,000      
2004 Stock Incentive Plan and 2012 Formula Plan [Member] | Common Class A [Member] | Stock Option [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Stock option expiration period       10 years    
2004 Stock Incentive Plan and 2012 Formula Plan [Member] | Common Class A [Member] | Stock Option [Member] | Minimum [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Stock award vesting period       6 months    
2004 Stock Incentive Plan and 2012 Formula Plan [Member] | Common Class A [Member] | Stock Option [Member] | Maximum [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Stock award vesting period       3 years    
2004 Stock Incentive Plan and 2012 Formula Plan [Member] | Common Class A [Member] | Non-vested Restricted Stock Awards and Restricted Stock Units [Member] | Minimum [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Stock award vesting period       1 year    
2004 Stock Incentive Plan and 2012 Formula Plan [Member] | Common Class A [Member] | Non-vested Restricted Stock Awards and Restricted Stock Units [Member] | Maximum [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Stock award vesting period       3 years