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Share-Based Compensation - Schedule of Stock Options Activity (Detail) - Employee stock option [member] - $ / shares
3 Months Ended 12 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Outstanding, beginning balance 1,076,031 616,832    
Effect of the spin-offs 251,145      
Granted 710,967 503,150 309,528 334,530
Exercised (10,681) (5,724)    
Forfeited, canceled or expired (2,146) (38,227)    
Outstanding, ending balance 2,025,316 1,076,031 616,832  
Exercisable 793,005 293,517    
Weighted average exercise price, beginning balance $ 66.83 $ 73.47    
Weighted average exercise price, effect of the spin-offs 57.60      
Weighted average exercise price, granted 58.02 58.83 $ 82.38 $ 64.59
Weighted average exercise price, exercised 45.35 64.59    
Weighted average exercise price, forfeited, canceled or expired 57.99 69.03    
Weighted average exercise price, ending balance 50.89 [1] 66.83 $ 73.47  
Weighted average exercise price, exercisable $ 48.23 [1] $ 70.57    
[1] The weighted average exercise price was adjusted to reflect the Conversion Factor.