Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2021	May 31, 2021
Summary Of Significant Accounting Policy [Line Items]
Debt instrument basis spread on variable rate	1.00%
Debt instrument, description of variable rate basis	one-month USD LIBOR rate.
Restricted Stock [Member]
Summary Of Significant Accounting Policy [Line Items]
Shares withheld to satisfy tax withholding obligations	155,575
Stock Repurchase Plan [Member]
Summary Of Significant Accounting Policy [Line Items]
Available authorized repurchase amount	$ 270,700,000
Stock repurchase plan expiration date	May 13, 2023
Stock repurchased, average costs per share	$ 393.05
Maximum [Member] | Stock Repurchase Plan [Member]
Summary Of Significant Accounting Policy [Line Items]
Stock repurchase plan, authorized amount		$ 300,000,000.0
Accounting Standards Update 2019-12 [Member]
Summary Of Significant Accounting Policy [Line Items]
Accounting standards update, adoption date	Jan. 01, 2021
Accounting standards update, adopted	true
Accounting standards update, immaterial effect	true
Accounting Standards Update 2018-15 [Member]
Summary Of Significant Accounting Policy [Line Items]
Accounting standards update, adoption date	Jan. 01, 2020
Accounting standards update, adopted	true
Accounting standards update, immaterial effect	true
Accounting Standards Update 2018-13 [Member]
Summary Of Significant Accounting Policy [Line Items]
Accounting standards update, adoption date	Jan. 01, 2020
Accounting standards update, adopted	true
Accounting standards update, immaterial effect	true