SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, NET INCOME PER SHARE (Details) $ / shares in Units, shares in Thousands, $ in Thousands			3 Months Ended				6 Months Ended
		Jun. 07, 2021	Jun. 30, 2021 USD ($) $ / shares shares	Mar. 31, 2021 USD ($)	Jun. 30, 2020 USD ($) $ / shares shares	Mar. 31, 2020 USD ($)	Jun. 30, 2021 USD ($) $ / shares shares	Jun. 30, 2020 USD ($) $ / shares shares
Numerator:
Net income | $			$ 61,148	$ 74,212	$ 60,360	$ 72,793	$ 135,360	$ 133,153
Denominator:
Denominator for basic net income per share - weighted-average outstanding shares (in shares)	[1]		392,306		375,239		391,942	369,972
Effect of dilutive securities:
Stock options, restricted stock awards and restricted stock units (in shares)			1,792		2,097		1,964	2,576
Denominator for diluted net income per share — weighted average outstanding shares (in shares)	[1]		394,098		377,336		393,906	372,548
Net income per share - basic (in dollars per share) | $ / shares	[1]		$ 0.16		$ 0.16		$ 0.35	$ 0.36
Net income per share - diluted (in dollars per share) | $ / shares	[1]		$ 0.16		$ 0.16		$ 0.34	$ 0.36
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share			206		703		553	832
Conversion ratio		10					10
Performance-based restricted stock awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share			718		794		718	794

[1] (1) Prior period amounts have been retroactively adjusted to reflect the ten-for-one stock split effected in the form of a stock dividend in June 2021. See Note 2 for details.