Summary of Significant Accounting Policies - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2020 USD ($) $ / shares shares
Restricted Stock [Member]
Summary Of Significant Accounting Policy [Line Items]
Shares withheld to satisfy tax withholding obligations | shares	671
Stock Repurchase Plan [Member]
Summary Of Significant Accounting Policy [Line Items]
Available authorized repurchase amount | $	$ 242,000,000.0
Stock repurchase plan expiration date	Mar. 12, 2022
Number of common stocks repurchased during the period | shares	40,032,000
Stock repurchased, average costs per share | $ / shares	$ 204.04
Maximum [Member] | Stock Repurchase Plan [Member]
Summary Of Significant Accounting Policy [Line Items]
Stock repurchase plan, authorized amount | $	$ 250,000,000.0