Quarterly Results of Operations

12 Months Ended

Dec. 31, 2020

Quarterly Financial Information Disclosure [Abstract]

Quarterly Results of Operations

QUARTERLY RESULTS OF OPERATIONS (UNAUDITED)

(In thousands, except per share amounts)	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
2020:
Operating revenues	$	592,703	$	568,959	$	590,214	$	620,302
Operating income	31,066		52,818		62,103		81,451
Net income	23,058		39,132		46,332		60,556
Basic earnings per share	0.33		0.57		0.67		0.88
Diluted earnings per share	0.33		0.56		0.67		0.88

(In thousands, except per share amounts)	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
2019:
Operating revenues	$	596,117	$	627,533	$	618,264	$	621,787
Operating income	48,019		58,442		53,357		65,654
Net income	36,086		43,318		39,044		48,496
Basic earnings per share	0.51		0.62		0.56		0.70
Diluted earnings per share	0.51		0.62		0.56		0.70