Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans - Additional Information (Detail)

v3.3.1.900
Employee Benefit Plans - Additional Information (Detail)
3 Months Ended 12 Months Ended
Jun. 30, 2015
shares
Jun. 30, 2012
shares
Dec. 31, 2015
USD ($)
Plans
Members
Employer
shares
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Number of active stock compensation plans | Plans     3    
Additional terminated plans with outstanding grants | Plans     1    
Restricted stock shares     1,443,000    
Number of employers to make contribution under multi-employer plan | Employer     200    
Pension Protection     2006 2006 2006
Number of employee increase / (decrease) under multi employer benefit percentage     4.80% 2.80%  
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]          
Multi-Employer Benefit AI Pension Plan     Less than 65 percent    
Plans In Yellow Zone [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Multi-Employer 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]          
Multi-Employer 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
Non-vested Restricted Stock Awards and Restricted Stock Units [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Tax benefits recognized related to the compensation expenses | $     3,700,000 2,900,000 2,700,000
Compensation expense not yet recognized | $     34,500,000    
Non-vested Restricted Stock Awards and Restricted Stock Units [Member] | Selling, General and Administrative Expenses [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Compensation expense | $     $ 9,800,000 7,700,000 7,200,000
Non-vested restricted stock [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Total compensation cost related to non-vested options expected to be recognized over weighted average period     9 years 8 months 12 days    
401(k) plan [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Employer contribution | $     $ 7,700,000 $ 7,400,000 $ 7,200,000
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     1,400,000    
2012 Plan [Member] | Restricted Stock Units [Member] | Executive Officer [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Stock award vesting period     15 years    
Restricted stock shares     1,000,000    
2012 Plan [Member] | Restricted Stock Units [Member] | Minimum [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Stock award vesting period     2 years    
2012 Plan [Member] | Restricted Stock Units [Member] | Maximum [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Stock award vesting period     3 years    
2012 Plan [Member] | Common Class A [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Number of shares authorized 4,000,000 2,000,000      
2012 Formula Plan [Member] | Restricted Stock [Member] | Director [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Restricted stock shares     21,000    
2012 Formula Plan [Member] | Common Class A [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Number of shares authorized   300,000      
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