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Stock Incentive Plan and Other Equity Activity (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Sale of Stock [Line Items]
Stock-based compensation expense	$ 1,835	$ 2,234
Shares withheld for taxes	(5,619)	(772)
Employee Stock Purchase Plan | ESPP
Sale of Stock [Line Items]
Stock-based compensation expense	$ 25	$ 18
Treasury Stock
Sale of Stock [Line Items]
Shares withheld for taxes (in shares)	(16)	46
Shares withheld for taxes	$ (296)	$ (668)
Treasury Stock | RSU/PSU
Sale of Stock [Line Items]
Shares withheld for taxes (in shares)	246
Shares withheld for taxes	$ 5,619

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-SubTopic 10
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