Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2020

Quarterly results of operations for the years ended December 31, 2020 and 2019 are summarized below:


	Three Months Ended
	March 31		June 30		September 30		December 31
	(in thousands, except per-share amounts)
2020
Operating revenue	$	771,081	$	138,529	$	401,922	$	498,490
Operating income (loss)	(57,992)		(190,384)		(99,471)		(159,915)
Net income (loss)	(27,828)		(144,428)		(99,140)		(157,304)
Basic earnings (loss) per share	(0.41)		(1.81)		(1.07)		(1.61)
Diluted earnings (loss) per share	(0.41)		(1.81)		(1.07)		(1.61)

2019
Operating revenue	$	855,796	$	1,012,956	$	991,968	$	969,816
Operating income	87,804		163,938		124,681		124,624
Net income	56,076		114,501		83,464		81,214
Basic earnings per share	0.82		1.67		1.22		1.19
Diluted earnings per share	0.82		1.67		1.22		1.18