QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended								12 Months Ended
	Nov. 30, 2019	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Effect of Fourth Quarter Events [Line Items]
Revenues		$ 456,778	$ 291,041	$ 332,348	$ 386,457	$ 461,368	$ 429,111	$ 534,117	$ 641,681	$ 1,466,624	$ 2,066,277	$ 2,188,148
(Loss) earnings on equity method investments						69,302	3,860	3,650	3,684	(59)	80,496	1,137
Operating Income (Loss)		162,892	(7,533)	53,716	86,401	222,209	129,777	250,805	352,959	295,476	955,750	771,801
Net income		$ 131,206	$ (14,961)	$ 30,374	$ 53,910	$ 146,940	$ 90,358	$ 181,009	$ 262,763	$ 200,529	$ 681,070	$ 557,043
Basic (in dollars per share)		$ 0.33	$ (0.04)	$ 0.08	$ 0.14	$ 0.36	$ 0.22	$ 0.43	$ 0.62	$ 0.50	$ 1.64	$ 1.25
Diluted (in dollars per share)		$ 0.33	$ (0.04)	$ 0.08	$ 0.13	$ 0.36	$ 0.22	$ 0.43	$ 0.62	$ 0.50	$ 1.63	$ 1.24
Meade
Effect of Fourth Quarter Events [Line Items]
(Loss) earnings on equity method investments										$ (24)	$ 90,621	$ 2,369
Gain on Sale of Investments	$ (75,800)