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EARNINGS PER SHARE - Components of Calculation of Earnings Per Share (Detail) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	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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Incremental Common Shares Attributable To Restricted Stock Units

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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