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Long-term Incentive Compensation - Additional Information (Detail) - USD ($)
shares in Thousands, $ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Long-term incentive program (LTIP) expense $ 17,166 $ 24,745
Stock-based compensation expense 9,601 13,097
Estimated tax benefits recorded for stock-based compensation 3,300 4,539
Unrecognized compensation cost related to outstanding LTIP awards 91,479  
Unrecognized compensation cost related to nonvested stock-based compensation arrangements under equity compensation and stock purchase plans $ 60,244  
Unrecognized compensation cost related to nonvested stock-based compensation arrangements under performance-based cash component of LTIP costs, weighted average remaining period (in years) 1 year  
Unrecognized compensation cost related to nonvested stock-based compensation arrangements under stock-based component of LTIP costs, weighted average remaining period (in years) 1 year 3 months 24 days  
Tax benefits from stock award exercises $ 1,091 $ 8,668
Stock Appreciation Rights    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Stock granted (in shares) 244  
Aggregate grant-date fair value $ 3,453  
Weighted-average expected life (in years) 4 years 1 month 12 days  
Restricted Stock Units    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Stock granted (in shares) 54  
Aggregate grant-date fair value $ 3,679  
Weighted-average expected life (in years) 2 years 5 months 24 days