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Stock-Based Compensation and Other Compensation - Narratives (Details) - USD ($)
 1 Months Ended 12 Months Ended
Jul. 31, 2016
Jul. 31, 2015
Jul. 31, 2014
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award            
Stock-based compensation expense       $ 21,222,000 $ 21,626,000 $ 31,075,000
Severance costs       500,000 800,000 1,000,000
Employee service share-based compensation, tax benefit from compensation expense       6,700,000 12,500,000 17,300,000
Options vested during the period, aggregate intrinsic value       27,800,000 58,100,000 56,400,000
Deferred compensation obligation       50,222,000 56,040,000  
Tax benefit recognized from stock awards       1,600,000    
Deferred Profit Sharing            
Share-based Compensation Arrangement by Share-based Payment Award            
Maximum annual contribution per employee, amount       $ 26,500 $ 26,500 $ 26,000
Maximum percentage of annual contribution allowed by employees       10.00% 10.00% 10.00%
Profit sharing expense       $ 3,900,000 $ 4,100,000 $ 3,500,000
RSUs Awarded            
Share-based Compensation Arrangement by Share-based Payment Award            
Shares granted in period       277,836 189,893 188,619
Vesting period for stock options       3 years    
PSUs Awarded            
Share-based Compensation Arrangement by Share-based Payment Award            
Shares granted in period       200,005 75,277 89,653
Vesting period for stock options       3 years    
PSUs Awarded | Minimum            
Share-based Compensation Arrangement by Share-based Payment Award            
Potential performance return rate for stock awards       0 0 0
PSUs Awarded | Maximum            
Share-based Compensation Arrangement by Share-based Payment Award            
Potential performance return rate for stock awards       3 3 3
Employee Stock Purchase Plan            
Share-based Compensation Arrangement by Share-based Payment Award            
Stock-based compensation expense       $ 100,000 $ 100,000 $ 300,000
Share-based compensation arrangement by share-based payment award, maximum employee contribution rate       10.00%    
Share based compensation, effective share purchase price for participant       90.00% 90.00% 85.00%
Proceeds from stock plans       $ 500,000 $ 500,000 $ 1,900,000
Long Term Incentive Plan            
Share-based Compensation Arrangement by Share-based Payment Award            
Stock options required to be issued (shares)       1,217,274 1,395,907  
Deferred compensation obligation       $ 50,200,000 $ 56,000,000  
Fair value assumptions expected dividend rate       0.00%    
Unrecognized stock based compensation expense       $ 19,600,000    
Weighted-average remaining term       2 years    
Long Term Incentive Plan | Minimum            
Share-based Compensation Arrangement by Share-based Payment Award            
Risk free interest rate       0.90%    
Fair value assumptions expected volatility rate       18.20%    
Fair value assumptions expected volatility rate peer index       15.00%    
Long Term Incentive Plan | Maximum            
Share-based Compensation Arrangement by Share-based Payment Award            
Risk free interest rate       1.10%    
Fair value assumptions expected volatility rate       19.10%    
Fair value assumptions expected volatility rate peer index       15.60%    
2009 Incentive Plan            
Share-based Compensation Arrangement by Share-based Payment Award            
Shares authorized for grant       5,900,000    
Shares available for grant       1,873,145    
Share-based award description      
The 2009 Incentive Plan provides for the grant of (i) stock options, (ii) RSUs, (iii) PSUs, and (iv) dividend equivalent rights. The vesting of grants under both plans is accelerated upon a change in our control and under certain other conditions.
   
2009 Incentive Plan | RSUs Awarded            
Share-based Compensation Arrangement by Share-based Payment Award            
Shares granted in period       262,824 173,741 172,460
2009 Incentive Plan | PSUs Awarded            
Share-based Compensation Arrangement by Share-based Payment Award            
Shares granted in period       200,005 75,277 89,653
2009 Incentive Plan | Employment agreements | PSUs Awarded            
Share-based Compensation Arrangement by Share-based Payment Award            
Performance stock awards excluded from LTIP count (shares)         10,000 10,000
2009 Non-Employee Directors Plan            
Share-based Compensation Arrangement by Share-based Payment Award            
Shares authorized for grant       325,000    
Shares available for grant       185,693    
Stock based incentive plan shares issued, shares 13,860 16,152 16,159      
Stock based incentive plan shares issued, value $ 1,000,000 $ 1,000,000 $ 1,000,000      
1997 Incentive Plan            
Share-based Compensation Arrangement by Share-based Payment Award            
Weighted average remaining term on stock option       10 years    
Vesting period for stock options       4 years    
Options exercised during the period, aggregate intrinsic value       $ 3,700,000 $ 7,400,000 $ 4,900,000
Employee Severance            
Share-based Compensation Arrangement by Share-based Payment Award            
Severance costs       8,200,000    
Employee Severance | Stock Compensation Plan            
Share-based Compensation Arrangement by Share-based Payment Award            
Severance costs       $ 3,200,000