Unaudited Quarterly Financial Data (Tables)

12 Months Ended

Dec. 31, 2020

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information

The following tables sets forth certain unaudited consolidated quarterly financial data for the years ended 2020 and 2019:

	For the Quarters Ended
(in thousands, except per share amounts)	3/31/2020		6/30/2020		9/30/2020		12/31/2020
Operating revenue	$	352,920	$	385,086	$	436,727	$	467,642
Operating income	$	55,193	$	82,211	$	73,183	$	120,395
Equity in (losses)/earnings of affiliates, net of tax	$	512	$	376	$	971	$	—
Components of net income:
Net income from continuing operations	$	24,284	$	51,069	$	102,467	$	86,430
Loss from discontinued operations, net of tax	9,535		7,935		10,679		6,214
Gain from sale of discontinued operations, net of tax	—		—		—		2,742
Net income	$	33,819	$	59,004	$	113,146	$	95,386
Basic income/(loss) per share:
Net income from continuing operations	$	0.31	$	0.64	$	1.29	$	1.13
Loss from discontinued operations, net of tax	0.12		0.10		0.13		0.08
Gain from sale of discontinued operations, net of tax	—		—		—		0.04
Net income	$	0.43	$	0.74	$	1.42	$	1.25
Diluted income/(loss) per share:
Net income from continuing operations	$	0.30	$	0.63	$	1.26	$	1.10
Loss from discontinued operations, net of tax	0.12		0.10		0.13		0.08
Gain from sale of discontinued operations, net of tax	—		—		—		0.03
Net income	$	0.42	$	0.73	$	1.39	$	1.21
Weighted-average common shares outstanding:
Basic	79,028		79,403		79,467		76,271
Diluted	80,525		80,646		81,402		78,371

	For the Quarters Ended
(in thousands, except per share amounts)	3/31/2019		6/30/2019		9/30/2019		12/31/2019
Operating revenue	$	337,723	$	374,738	$	375,571	$	352,841
Operating income	$	8,002	$	1,801	$	61,867	$	50,365
Equity in earnings/(losses) of affiliates, net of tax	$	(422)	$	313	$	607	$	58
Components of net income:
Net income from continuing operations	$	(7,873)	$	(15,570)	$	31,668	$	25,545
Loss from discontinued operations, net of tax	9,559		9,999		(8,485)		4,537
Net income	$	1,686	$	(5,571)	$	23,183	$	30,082
Basic income/(loss) per share:
Net income from continuing operations	$	(0.10)	$	(0.19)	$	0.40	$	0.32
Loss from discontinued operations, net of tax	0.12		0.12		(0.11)		0.06
Net income	$	0.02	$	(0.07)	$	0.29	$	0.38
Diluted income/(loss) per share:
Net income from continuing operations	$	(0.10)	$	(0.19)	$	0.39	$	0.32
Loss from discontinued operations, net of tax	0.12		0.12		(0.10)		0.06
Net income	$	0.02	$	(0.07)	$	0.29	$	0.38
Weighted-average common shares outstanding:
Basic	80,179		80,473		79,761		79,125
Diluted	81,277		80,473		80,914		80,356