Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Numerator for basic and diluted net income per share:
Net income from continuing operations	$ 102,467	$ 31,668	$ 177,820	$ 8,225
Income/(loss) from discontinued operations, net of tax	10,679	(8,485)	28,149	11,073
Net income	$ 113,146	$ 23,183	$ 205,969	$ 19,298
Denominator:
Weighted-average shares for basic income per share (in shares)	79,467	79,761	79,300	80,138
Dilutive effect of stock options and restricted stock units (in shares)	1,935	1,153	1,836	1,067
Weighted-average shares for diluted income per share (in shares)	81,402	80,914	81,136	81,205
Basic:
Net income from continuing operations (usd per share)	$ 1.29	$ 0.40	$ 2.24	$ 0.10
Income/(loss) from discontinued operations, net of tax (usd per share)	0.13	(0.11)	0.35	0.14
Net (loss)/income (usd per share)	1.42	0.29	2.59	0.24
Diluted:
Net income from continuing operations (usd per share)	1.26	0.39	2.19	0.10
Income/(loss) from discontinued operations, net of tax (usd per share)	0.13	(0.10)	0.35	0.14
Net (loss)/income (usd per share)	$ 1.39	$ 0.29	$ 2.54	$ 0.24
RSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share	100	100	100	100
PBRSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share	100	100	100	100