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EARNINGS PER SHARE - Components of Calculation of Earnings Per Share (Detail) - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Earnings Per Share [Abstract] |  |  |
Net income | $ 308,722 | $ 193,814 | $ 223,994
Weighted average number of shares used in: |  |  |
Basic earnings per share (in shares) | 110,768 | 110,939 | 110,603
Dilutive common stock equivalents: |  |  |
Restricted stock units (in shares) | 625 | 569 | 1,029
Diluted earnings per share (in shares) | 111,393 | 111,508 | 111,632

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