Stock Plans - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Stock Plans
Employee service share-based compensation tax benefit realized from share-based compensation plans	$ 0.7	$ 1.5	$ 1.0

The actual tax benefit realized from exercise, vesting or cancellation of the stock-based employee compensation arrangements.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration