Earnings (Loss) Per Share - Reconciliation of the Numerator and Denominator of Basic and Diluted Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Numerator [Abstract]
Income from continuing operations - numerator for earnings (loss) per share	$ 644	$ 19,944
Loss from discontinued operations - numerator for earnings (loss) per share	(63)	(808)
Net income	$ 581	$ 19,136
Denominator [Abstract]
Shares used for basic income (loss) per share	49,838	49,222
Effect of dilutive stock options and stock units outstanding [Abstract]
Shares used for diluted income (loss) per share	50,557	50,340
Earnings (loss) per share attributable to - basic [Abstract]
Continuing operations (in dollars per share)	$ 0.01	$ 0.41
Discontinued operations (in dollars per share)	0.00	(0.02)
Net income	0.01	0.39
Earnings (loss) per share - diluted [Abstract]
Continuing operations (in dollars per share)	0.01	0.40
Discontinued operations (in dollars per share)	0.00	(0.02)
Net income	$ 0.01	$ 0.38
Non-Qualified Stock Options
Effect of dilutive stock options and stock units outstanding [Abstract]
Effect of dilutive stock options and restricted stock units outstanding (in shares)	77	62
Restricted Stock Units (RSUs)
Effect of dilutive stock options and stock units outstanding [Abstract]
Effect of dilutive stock options and restricted stock units outstanding (in shares)	363	844
Market Stock Units
Effect of dilutive stock options and stock units outstanding [Abstract]
Effect of dilutive stock options and restricted stock units outstanding (in shares)	279	151
Performance-Based Stock Units
Effect of dilutive stock options and stock units outstanding [Abstract]
Effect of dilutive stock options and restricted stock units outstanding (in shares)		61
Non-Qualified Stock Options
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Dilutive securities outstanding not included in the computation of earnings per share because their effect is anti-dilutive (in shares)	262	268
Restricted Stock Units (RSUs)
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Dilutive securities outstanding not included in the computation of earnings per share because their effect is anti-dilutive (in shares)	35	9