Quarterly Results of Operations

12 Months Ended

Dec. 31, 2018

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
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

(In thousands, except per share amounts)	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
2017:
Operating revenues	$	501,221	$	519,508	$	528,643	$	567,365
Operating income	25,972		36,913		35,874		45,061
Net income	16,019		23,219		22,517		141,134
Basic earnings per share	0.22		0.32		0.31		1.95
Diluted earnings per share	0.22		0.32		0.31		1.94