Number of shares that have been repurchased and retired during the period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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Name:	us-gaap_StockRepurchasedAndRetiredDuringPeriodShares
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Basis of Presentation - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Mar. 31, 2018
Basis Of Presentation [Line Items]
Repurchases of shares, value	$ 0	$ 41,776,000
Share Repurchase Program
Basis Of Presentation [Line Items]
Stock repurchase program, additional amount authorized		$ 50,000,000.0
Repurchases of shares		661,637
Repurchases of shares, value		$ 43,200,000
Remaining amount of repurchase program	$ 102,600,000
Non cash activity related share repurchase program		$ 1,400,000
Share Repurchase Program \| Maximum
Basis Of Presentation [Line Items]
Stock repurchase program, authorized amount			$ 150,000,000.0	$ 50,000,000.0