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STOCKHOLDERS' EQUITY - Stock Repurchases (Details) - USD ($) shares in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Jun. 15, 2020
Equity [Abstract] |  |  |  |
Repurchases unsettled (in shares) | (278) | (333) | (1,001) |
Stock Repurchase Program, Remaining Authorized Repurchase Amount [Roll Forward] |  |  |  |
Authorization remaining, beginning of period | $ 45,484,000 | $ 6,620,000 | $ 34,892,000 |
Authorizations | 20,516,000 | 60,000,000 | 27,003,000 |
Repurchases | (28,274,000) | (21,136,000) | (55,275,000) |
Authorization remaining, end of period | $ 37,726,000 | $ 45,484,000 | $ 6,620,000 |
Stock repurchase program, authorized amount |  |  |  | $ 60,000,000

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- Definition The value of shares repurchased that did not settle with transfer agent as of the reporting date. + References No definition available. + Details
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- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
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