Significant Accounting Policies - Additional Information (Details)	1 Months Ended	9 Months Ended
	May 29, 2020 USD ($) shares	Sep. 30, 2020 USD ($) Segment shares	Sep. 30, 2019 USD ($)	May 01, 2020 USD ($)
Significant Accounting Policies [Line Items]
Number of operating segment | Segment		1
Common stock split, description		On February 21, 2020, we announced that our Board of Directors approved a three-for-two split of our common stock for shareholders of record as of the close of business on the record date of March 10, 2020. On March 24, 2020, those shareholders received one additional share of common stock for every two shares owned.
Common stock split, conversion ratio		1.5
Payments made to third party financial institution for share repurchase under the ASR agreement	$ 125,000,000.0
Number of shares received under stock repurchase ASR agreement | shares	511,427
Payments for repurchase of common stock recieved under stock repurchase ASR agreement	$ 87,500,000	$ 306,791,000	$ 205,346,000
Percentage of shares received under stock repurchase ASR agreement	70.00%
Allowance for uncollectible accounts		4,900,000
2019 Share Repurchase Program [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Stock repurchase program, authorized amount	$ 21,500,000			$ 350,000,000.0
2020 Share Repurchase Program [Member]
Significant Accounting Policies [Line Items]
Stock repurchase program, remaining authorized repurchase amount		$ 612,500,000
2020 Share Repurchase Program [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Stock repurchase program, authorized amount				$ 700,000,000.0
Share Repurchase Program [Member]
Significant Accounting Policies [Line Items]
Stock repurchased and retired during period, shares | shares		2,237,320
Stock repurchased and retired during period, value		$ 306,800,000