Note 18 - Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

Quarterly Financial Information [Table Text Block]

201 7 Quarters (In thousands, except per share amounts)	First		Second		Third		Fourth
Operating revenue	$	173,159	$	171,511	$	170,679	$	182,771
Operating income		13,938		15,569		13,022		14,333
Net income		8,214		9,141		7,855		65,074
Net income – excluding deferred income taxes benefit (1)		8,214		9,141		7,855		8,609
Basic earnings per common share		0.15		0.17		0.14		1.19
Basic earnings per common share – excluding deferred income taxes benefit (1)		0.15		0.17		0.14		0.16
Diluted earnings per common share		0.15		0.17		0.14		1.18
Di luted earnings per common share – excluding deferred income taxes benefit (1)		0.15		0.17		0.14		0.16

201 6 Quarters ( In thousands, except per share amounts)	First		Second		Third		Fourth
Operating revenue	$	161,929	$	166,090	$	170,464	$	172,661
Operating income		14,125		14,776		14,869		14,533
Net income		8,193		8,531		8,437		8,303
Basic earnings per common share		0.15		0.16		0.16		0.15
Diluted earnings per common share		0.15		0.16		0.15		0.15