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EARNINGS PER SHARE (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
EARNINGS PER SHARE (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Mar. 31, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Payments for Repurchase of Common Stock		$ 2,901	$ 153,049	$ 127,169
Treasury Stock, Shares, Acquired			3,455,584	2,003,446
Stock Appreciation Rights (SARs)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share		1,800,000	1,700,000	1,600,000
Treasury Stock, Common [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Treasury Stock, Common, Shares		5,459,030			365,272
Payments for Repurchase of Common Stock	$ 150,000	$ 275,000	$ 125,000
Treasury Stock, Shares, Acquired		3,090,312	2,368,738