Quarterly Financial Information (unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended																12 Months Ended
		Dec. 31, 2021	[1]	Sep. 30, 2021		Jun. 30, 2021		Mar. 31, 2021		Dec. 31, 2020	[2]	Sep. 30, 2020		Jun. 30, 2020		Mar. 31, 2020		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Revenues		$ 126,808		$ 126,289		$ 120,071		$ 108,085		$ 100,617		$ 95,481		$ 81,923		$ 159,692		$ 481,252	$ 437,714	$ 633,066
Gross margin		46,056		49,178		48,837		48,269		44,168		45,382		45,879		42,713
Income (loss) before income taxes		(15,424)		112,624		8,958		27,564		15,793		23,236		23,959		11,411		133,721	74,399	65,510
Income (loss) from continuing operations		(25,038)		103,699		8,771		19,944		14,642		16,750		17,202		8,275		107,376	56,869	45,217
Income (loss) from discontinued operations, net of income tax		(308)		(932)		(414)		(808)		(26,260)		(59,168)		11,309		(206,381)		(2,462)	(280,500)	(332,038)
Net income (loss)		$ (25,346)		$ 102,767		$ 8,357		$ 19,136		$ (11,618)		$ (42,418)		$ 28,511		$ (198,106)		$ 104,914	$ (223,631)	$ (286,821)
Earnings (loss) per share - basic:
Continuing operations		$ (0.50)	[3]	$ 2.09	[3]	$ 0.18	[3]	$ 0.41	[3]	$ 0.30	[3]	$ 0.34	[3]	$ 0.35	[3]	$ 0.17	[3]	$ 2.17	$ 1.17	$ 0.97
Discontinued operations		(0.01)	[3]	(0.02)	[3]	(0.01)	[3]	(0.02)	[3]	(0.54)	[3]	(1.21)	[3]	0.23	[3]	(4.25)	[3]	(0.05)	(5.75)	(7.14)
Net income (loss)	[4]	(0.51)	[3]	2.07	[3]	0.17	[3]	0.39	[3]	(0.24)	[3]	(0.87)	[3]	0.59	[3]	(4.08)	[3]	2.12	(4.59)	(6.17)
Earnings (loss) per share – diluted:
Continuing operations		(0.50)	[3]	2.06	[3]	0.17	[3]	0.40	[3]	0.29	[3]	0.34	[3]	0.35	[3]	0.17	[3]	2.13	1.16	0.96
Discontinued operations		(0.01)	[3]	(0.02)	[3]	(0.01)	[3]	(0.02)	[3]	(0.53)	[3]	(1.20)	[3]	0.23	[3]	(4.22)	[3]	(0.05)	(5.70)	(7.05)
Net income (loss)		$ (0.50)	[3],[4]	$ 2.04	[3],[4]	$ 0.17	[3],[4]	$ 0.38	[3],[4]	$ (0.23)	[3],[4]	$ (0.86)	[3],[4]	$ 0.58	[3],[4]	$ (4.05)	[3],[4]	$ 2.08	$ (4.54)	$ (6.09)

[1] Loss from continuing operations for the fourth quarter of 2021 includes an unrealized loss of $41.4 million related to the change in fair value of the Sharecare Equity Security and an unrealized gain of $1.9 million related to the de-designated swaps, each of which was recorded to other (income) expense, net. The income tax benefit that would have otherwise resulted from the unrealized loss of $41.4 million was fully offset by income tax expense due to an increase in the valuation allowance on deferred tax assets related to capital loss carryforwards; therefore, there was no net income tax benefit associated with this loss.  In addition, loss from continuing operations for the fourth quarter of 2021 includes a total of $0.5 million related to CEO transition costs, acquisition and integration costs, and project costs, which was primarily recorded to selling, general, and administrative expenses. Finally, the impact of potentially dilutive securities for the three months ended December 31, 2021 was not considered because the impact would be anti-dilutive.

[2] Income from continuing operations for the fourth quarter of 2020 includes strategic project costs, CEO transition costs, and acquisition and integration costs of $2.3 million, $1.0 million, and $0.6 million, respectively, each of which were primarily recorded to selling, general, and administrative expenses.

[3] We calculated earnings per share for each of the quarters based on the weighted average number of shares and dilutive securities outstanding for each period. Accordingly, the sum of the quarters may not necessarily be equal to the full year income per share.

[4] Figures may not add due to rounding.