Quarterly Results of Operations

12 Months Ended

Dec. 31, 2019

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
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

(In thousands, except per share amounts)	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
2018:
Operating revenues	$	562,684	$	619,130	$	629,735	$	646,365
Operating income	35,115		50,783		63,386		74,931
Net income	27,807		38,264		47,514		54,563
Basic earnings per share	0.38		0.53		0.67		0.77
Diluted earnings per share	0.38		0.53		0.66		0.77