Share-based Compensation - Summary of SARs Activity (Detail) - Stock-Settled SARs Activity [Member]	3 Months Ended
	Mar. 31, 2020 $ / shares shares
Shares
Outstanding, beginning balance (in shares) | shares	625,368
Exercised (in shares) | shares	(369,362)
Expired or forfeited (in shares) | shares	0
Outstanding, ending balance (in shares) | shares	256,006
Weighted-Average Exercise Price
Outstanding, beginning balance (in dollars per share) | $ / shares	$ 33.60
Exercised (in dollars per share) | $ / shares	32.59
Expired or forfeited (in dollars per share) | $ / shares	0
Outstanding, ending balance (in dollars per share) | $ / shares	$ 35.05