Equity - Schedule of Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2023	Mar. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 4,994	$ 5,285
Related tax benefit recognized	1,170	1,225
Amount capitalized for internal-use software	312	506
Total stock-based compensation	5,306	5,791
Marketing and advertising
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	455	313
Customer care and enrollment
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	605	454
Technology and content
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	905	1,850
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	3,029	2,668
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	4,677	4,706
Common stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	254	257
Employee stock purchase program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 63	$ 322

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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