Quarterly Financial Data (unaudited)

12 Months Ended

Dec. 31, 2016

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Data (unaudited)

(16) Quarterly Financial Data (unaudited)

	2016
	1st quarter		2nd quarter		3rd quarter		4th quarter
	(in thousands, except per share information)
Operating revenue	$	260,394	$	276,813	$	271,493	$	264,051
Operating income		13,930		16,774		10,027		5,849
Income before income taxes		12,105		14,771		8,119		4,410
Provision for income taxes		4,628		5,724		3,122		1,687
Net income	$	7,477	$	9,047	$	4,997	$	2,723
Earnings per common share:
Basic	$	0.26	$	0.32	$	0.18	$	0.10
Diluted	$	0.26	$	0.32	$	0.18	$	0.10
Weighted average number of common shares outstanding:
Basic		28,402		28,414		28,413		28,415
Diluted		28,402		28,414		28,413		28,415

	2015
	1st quarter		2nd quarter		3rd quarter		4th quarter
	(in thousands, except per share information)
Operating revenue	$	263,561	$	295,007	$	284,214	$	285,991
Operating income		15,067		22,920		16,944		18,464
Income before income taxes		13,332		21,584		15,001		15,088
Provision for income taxes		5,168		8,300		5,754		5,782
Net income	$	8,164	$	13,284	$	9,247	$	9,306
Earnings per common share:
Basic	$	0.27	$	0.44	$	0.32	$	0.33
Diluted	$	0.27	$	0.44	$	0.32	$	0.33
Weighted average number of common shares outstanding:
Basic		29,992		29,979		28,661		28,380
Diluted		29,998		29,980		28,661		28,382