STOCKHOLDERS' EQUITY - Components of the stock-based compensation programs (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Time lapse restricted stock:
Pre-tax compensation expense	$ 3,920	$ 10,511	$ 11,762	$ 18,151
Tax benefit	(1,025)	(1,180)	(2,950)	(3,117)
Restricted stock expense, net of tax	$ 2,895	$ 9,331	$ 8,812	$ 15,034

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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