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Stock-based Compensation - Narrative (Details)		1 Months Ended	12 Months Ended
	Mar. 31, 2017 $ / shares	Mar. 31, 2016 $ / shares shares	Dec. 31, 2023 USD ($) $ / shares shares	Dec. 31, 2022 USD ($) $ / shares shares	Dec. 31, 2021 USD ($) performancePeriod $ / shares shares	Dec. 31, 2020 shares	Dec. 31, 2019 shares	Nov. 02, 2023 shares	Apr. 20, 2023 shares	Apr. 15, 2021 shares	Jun. 13, 2018 shares	May 01, 2015 shares	Sep. 23, 2013 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)								27,400	19,400	15,400	10,500	6,000
Number of options issued (in shares)			658,000	1,895,000
Stock-based compensation capitalized | $			$ 0	$ 0	$ 0
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			3 years
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			4 years
1st Tranche
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average fair value per option granted (in dollars per share) | $ / shares			$ 20.64
2nd Tranche
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average fair value per option granted (in dollars per share) | $ / shares			$ 20.69
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards issued (in shares)			2,152,000	2,268,000
Vesting period			3 years
Vesting percentage			25.00%
Weighted-average fair value per option granted (in dollars per share) | $ / shares			$ 33.85	$ 28.23	$ 21.10
Aggregate intrinsic value, vested | $			$ 20,200,000	$ 11,600,000	$ 7,300,000
Granted (in shares)			1,281,000
RSUs | New Century Health
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			1 year
RSUs | Non-Employee Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			1 year
RSUs | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Requisite service period for vesting			3 years
RSUs | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Requisite service period for vesting			4 years
RSUs | 1st Tranche
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage			33.00%
Leveraged Stock Units (LSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards issued (in shares)			0	520,000
Weighted-average fair value per option granted (in dollars per share) | $ / shares			$ 9.15
Granted (in shares)			520,000			500,000	700,000
PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards issued (in shares)			1,653,000	1,396,000
Vesting period			3 years
Weighted-average fair value per option granted (in dollars per share) | $ / shares			$ 34.07
Granted (in shares)			542,000	500,000	300,000
Performance goal threshold				100.00%
Maximum performance achieved, percentage of targeted shares earned			250.00%		200.00%
Percentage adjustment of shares earned, total shareholder return in top quartile					10.00%
Number of performance period | performancePeriod					2
PSUs | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
EBITDA, goal period					2 years
PSUs | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
EBITDA, goal period					3 years
PSUs | 1st Tranche
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate			0.12%
Expected volatility rate			89.50%
Expected term			2 years
Expected dividend rate			0.00%
PSUs | 2nd Tranche
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate			0.25%
Expected volatility rate			77.70%
Expected term			3 years
Expected dividend rate			0.00%
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			4 years
Vesting percentage			25.00%
Expiration period			10 years
Fair value of options vested | $			$ 600,000	$ 2,600,000	$ 4,900,000
Intrinsic value of options exercised | $			$ 26,900,000	$ 16,300,000	$ 20,800,000
Performance-based stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options issued (in shares)			106,000	268,000
Granted (in shares)		300,000
Risk-free interest rate		1.83%
Expected volatility rate		65.00%
Expected term		10 years
Expected dividend rate		0.00%
Weighted-average fair value per option granted (in dollars per share) | $ / shares		$ 6.68
Performance-based stock options | Vest on March 1, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		50.00%
Performance-based stock options | Vest on March 1, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		50.00%
Common Class A | Performance-based stock options | 1st Tranche
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	33.33%
Award vesting rights, share price threshold (in dollars per share) | $ / shares	$ 13.35
Consecutive term		90 days
Common Class A | Performance-based stock options | 2nd Tranche
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	33.33%
Award vesting rights, share price threshold (in dollars per share) | $ / shares	$ 16.43
Consecutive term		90 days
Common Class A | Performance-based stock options | 3rd Tranche
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	33.33%
Award vesting rights, share price threshold (in dollars per share) | $ / shares	$ 19.51
Consecutive term		90 days
2011 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options issued (in shares)			4,800,000
2011 Plan | Restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards issued (in shares)				3,800,000
2011 Plan | Common Class A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)													9,100,000
2015 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options issued (in shares)			2,800,000	2,800,000
2015 Plan | RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards issued (in shares)			6,300,000	5,500,000
2015 Plan | Leveraged Stock Units (LSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards issued (in shares)			1,900,000	1,400,000
2015 Plan | PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards issued (in shares)			1,500,000	800,000

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