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STOCK-BASED COMPENSATION (Narrative) (Details) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
May 31, 2017 | May 31, 2010 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Dividend yield |  |  | 0.00% | 0.00% | 0.00%
Share-based compensation expense recognized |  |  | $ 20,142 | $ 27,725 | $ 36,210
Intrinsic value, options exercised |  |  | 1,800 | 4,000 | 11,100
Cash received from option exercises and employee stock purchase plan |  |  | 4,300 | 5,500 | 6,800
Tax benefit realized from stock options exercised |  |  | $ 100 | 600 | 2,200
Shares available for purchase (in shares) |  |  | 2,700,000 |  |
Capitalized share-based compensation cost |  |  | $ 600 | 600 | 500
2003 Plan |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Increase in authorized shares (in shares) | 1,700,000 | 3,500,000 |  |  |
Common stock reserved for issuance (in shares) |  |  | 14,700,000 |  |
2000 Plan |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Common stock reserved for issuance (in shares) |  |  | 4,000,000 |  |
2001 Plan |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Common stock reserved for issuance (in shares) |  |  | 4,000,000 |  |
Employee Stock Option |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Award vesting period |  |  | 4 years |  |
Share-based compensation expense recognized |  |  | $ 1,400 | 3,500 | 5,000
Total unrecognized compensation costs related to unvested awards |  |  | $ 3,800 |  |
Weighted-average period for cost recognition, in years |  |  | 3 years |  |
Employee Stock Option | Director |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Award vesting period |  |  | 1 year |  |
Employee Stock Option | Employee |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Expiration period, in years |  |  | 8 years |  |
Employee Stock Option | Directors and Certain Executive Officers | Minimum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Expiration period, in years |  |  | 6 years |  |
Employee Stock Option | Directors and Certain Executive Officers | Maximum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Expiration period, in years |  |  | 10 years |  |
Restricted Stock Units (RSUs) |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Award vesting period |  |  | 3 years |  |
Restricted Stock, Performance Stock and Contract Stock |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based compensation expense recognized |  |  | $ 18,700 | 24,300 | 31,200
Total unrecognized compensation costs related to unvested awards |  |  | $ 30,500 |  |
Weighted-average period for cost recognition, in years |  |  | 2 years |  |
Fair value of shares vested |  |  | $ 18,200 | $ 65,000 | $ 15,700
Requisite service periods of performance stock, restricted stock and contract stock awards, in years |  |  | 3 years |  |
Performance Shares Units |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vested or expected to vest at end of year (in shares) |  |  | 51,241 |  |
Employee Stock Purchase Plan |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Common stock reserved for issuance (in shares) |  |  | 3,000,000 |  |
Shares available for purchase (in shares) |  |  | 1,900,000 |  |
Shares issued (in shares) |  |  | 23,337 | 20,780 | 16,948
ESPP proceeds received |  |  | $ 1,000 | $ 1,100 | $ 1,100

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