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COMPENSATION ARRANGEMENTS (Tables) | 12 Months Ended
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Dec. 31, 2022
Share-Based Payment Arrangement [Abstract] |
Schedule of Stock-Based Compensation Expense | The stock-based compensation expense related to stock awards issued under the 2011 Plan and acquisition-related awards are presented within the following line items of the Consolidated Statements of Operations for the years ended December 31, 2022, 2021 and 2020 (in thousands):
| Year Ended December 31,
| 2022 |  | 2021 |  | 2020
Cost of revenue | $ | 395 |  |  | $ | 585 |  |  | $ | 662 |
Marketing | 1,054 |  |  | 748 |  |  | 1,522 |
Selling, general and administrative | 28,557 |  |  | 31,836 |  |  | 36,826 |
Restructuring and related charges | — |  |  | — |  |  | 1,735 |
Total stock-based compensation expense | $ | 30,006 |  |  | $ | 33,169 |  |  | $ | 40,745 |
Schedule of Restricted Stock Unit Activity | The table below summarizes restricted stock unit activity under the 2011 Plan for the year ended December 31, 2022:
| Restricted Stock Units |  | Weighted- Average Grant Date Fair Value (per share)
Unvested at December 31, 2021 | 2,205,235 |  |  | $ | 31.06 |
Granted | 2,720,990 |  |  | 16.95 |
Vested | (1,080,881) |  |  | 32.22 |
Forfeited | (969,255) |  |  | 24.82 |
Unvested at December 31, 2022 | 2,876,089 |  |  | $ | 19.33 |
Share-based Payment Arrangement, Performance Shares, Outstanding Activity | The table below summarizes Performance Share Unit activity under the 2011 Plan for the year ended December 31, 2022:
| Performance Share Units |  | Weighted-Average Grant Date Fair Value (per unit)
Unvested at December 31, 2021 | 37,763 |  |  | $ | 28.39 |
Granted | — |  |  | — |
Vested | (20,494) |  |  | 31.97 |
Forfeited | — |  |  | — |
Unvested at December 31, 2022 | 17,269 |  |  | $ | 24.13 |
Maximum shares issuable upon vesting at December 31, 2022 | 17,269 |  |  |

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- Definition Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for outstanding performance shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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