Quarterly Financial Information (Unaudited)

12 Months Ended

Dec. 31, 2018

Quarterly Financial Information (Unaudited) [Abstract]

Quarterly Financial Information (Unaudited)

Quarterly Financial Information (Unaudited)

	First		Second		Third		Fourth
	(In Thousands, Except Per Share Data)
Year ended December 31, 2018
Operating revenue	$	156,695	$	155,826	$	151,279	$	147,003
Operating income	12,948		22,147		25,132		29,560
Income before income taxes	13,290		22,570		25,718		30,339
Net income	13,378		17,803		19,056		22,440
Net income per share, basic	0.16		0.22		0.23		0.27
Net income per share, diluted	0.16		0.22		0.23		0.27
Year ended December 31, 2017
Operating revenue	$	129,903	$	129,616	$	182,114	$	165,703
Operating income	19,363		21,313		12,999		9,869
Income before income taxes	19,651		21,737		13,062		10,048
Net income	14,036		14,616		7,916		38,605
Net income per share, basic	0.17		0.18		0.10		0.45
Net income per share, diluted	0.17		0.18		0.09		0.45