Earnings per Share (EPS) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Numerator:
Income from continuing operations		$ 5,487	$ 8,495	$ 30,644	$ 1,716
Income (loss) from discontinued operations, net of tax		0	572	0	(4,334)
Net income (loss)		$ 5,487	$ 9,067	$ 30,644	$ (2,618)
Denominator:
Weighted-average shares used in basic EPS (in shares)		173,847	174,399	173,881	173,691
Dilutive effect of common stock equivalents (in shares)		3,119	5,010	3,537	5,258
Weighted-average shares used in diluted EPS (in shares)		176,966	179,409	177,418	178,949
Basic earnings (loss) per share:
Continuing operations (in dollars per share)	[1]	$ 0.03	$ 0.05	$ 0.18	$ 0.01
Discontinued operations (in dollars per share)	[1]	0	0	0	(0.02)
Net income (loss) (in dollars per share)	[1]	0.03	0.05	0.18	(0.02)
Diluted earnings (loss) per share:
Continuing operations (in dollars per share)	[1]	0.03	0.05	0.17	0.01
Discontinued operations (in dollars per share)	[1]	0	0	0	(0.02)
Net income (loss) (in dollars per share)	[1]	$ 0.03	$ 0.05	$ 0.17	$ (0.02)
Common stock equivalents excluded from calculation of diluted earnings per share because their impact would be anti-dilutive (in shares)		13,967	6,529	9,573	6,529

[1] The sum of the earnings per share amounts may not equal the totals due to rounding.