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COMPENSATION ARRANGEMENTS - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Apr. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total stock-based compensation expense | $ 30,006 | $ 33,169 | $ 40,745 |
Share-based payment arrangement, amount capitalized | $ 3,400 | 3,700 | 4,500 |
Number of shares available for grant (in shares) | 100,500,000 |  |  |
United States |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Defined contribution plan, employer matching contribution, percent of match | 50.00% |  |  |
Defined contribution plan, employer matching contribution, percent of employees' eligible compensation | 6.00% |  |  |
Defined contribution plan, vesting period | 3 years |  |  |
Defined contribution plan, cost | $ 5,800 | $ 6,700 | $ 6,600 |
Employee Stock Purchase Plan |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares available for grant (in shares) | 1,000,000 |  |  |
Shares issued under employee stock purchase plan (in shares) | 83,551 | 49,399 | 69,371 |
Restricted stock units |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Awards granted in period, weighted average grant date fair value (in usd per shares) | $ 16.95 | $ 31.48 | $ 24.92 |
Fair value of restricted stock award vested | $ 15,600 | $ 48,800 | $ 19,200 |
Unrecognized compensation costs, amount | $ 39,300 |  |  |
Unrecognized compensation costs, period for recognition | 1 year |  |  |
Forfeited (in shares) | 969,255 |  |  |
Share-based compensation arrangement by share-based payment award, equity instruments other than options, nonvested, number (in shares) | 2,876,089 | 2,205,235 |  |
Restricted stock units | Minimum |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Award vesting period | 1 year |  |  |
Restricted stock units | Maximum |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Award vesting period | 4 years |  |  |
Performance Share Units |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Awards granted in period, weighted average grant date fair value (in usd per shares) | $ 0 |  |  |
Forfeited (in shares) | 0 |  |  |
Share-based compensation arrangement by share-based payment award, equity instruments other than options, nonvested, number (in shares) | 17,269 | 37,763 |  |
Market-based Performance Share Units |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Forfeited (in shares) | 24,335 |  |  |
Expired (in shares) | 33,333 |  |  |
Share-based compensation arrangement by share-based payment award, equity instruments other than options, nonvested, number (in shares) | 0 |  |  |
Cost of revenue |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total stock-based compensation expense | $ 395 | $ 585 | 662 |
Marketing |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total stock-based compensation expense | 1,054 | 748 | 1,522 |
Selling, general and administrative |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total stock-based compensation expense | 28,557 | 31,836 | 36,826 |
Restructuring and related charges |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total stock-based compensation expense | $ 0 | $ 0 | $ 1,735 |
2011 Plan |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares authorized for awards (in shares) |  |  |  | 11,875,000
Number of shares available for future issuance (in shares) | 3,266,298 |  |  |

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