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Note 15 - Selected Quarterly Financial Information (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

Quarterly Financial Information [Table Text Block]

		Year Ended December 31, 2020
*(In thousands, except per share data)*		First				Second				Third				Fourth				Year
Summary Operating Results:
Total revenues		$	680,525			$	209,859			$	652,238			$	635,868			$	2,178,490
Operating income (loss)			(137,761	)			(86,348	)			127,073				111,299				14,263
Net income (loss)			(147,559	)			(108,544	)			38,116				83,287				(134,700	)

Basic net income (loss) per common share		$	(1.30	)		$	(0.96	)		$	0.34			$	0.73			$	(1.19	)
Diluted net income (loss) per common share		$	(1.30	)		$	(0.96	)		$	0.33			$	0.73			$	(1.19	)

		Year Ended December 31, 2019
*(In thousands, except per share data)*		First				Second				Third				Fourth				Year
Summary Operating Results:
Total revenues		$	827,288			$	846,132			$	819,568			$	833,131			$	3,326,119
Operating income			117,626				126,692				113,391				114,859				472,568
Net income			45,451				48,484				39,405				24,296				157,636

Basic net income per common share		$	0.40			$	0.43			$	0.35			$	0.21			$	1.39
Diluted net income per common share		$	0.40			$	0.43			$	0.35			$	0.21			$	1.38