Note 16 - Quarterly Financial Data (Unaudited)

12 Months Ended

Dec. 31, 2016

Notes to Financial Statements

Quarterly Financial Information [Text Block]

16

. Quarterly Financial Data (Unaudited)

The following is a summary of the quarterly results of operations for

2016

and

2015:

20 16 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		0.25		0.26		0.26		0.25
Diluted earnings per common share		0.25		0.26		0.26		0.25

2015 Quarters ( In thousands, except per share amounts)	First		Second		Third		Fourth
Operating revenue	$	161,287	$	163,588	$	171,346	$	168,773
Operating income		17,311		14,161		14,354		15,237
Net income		10,188		8,357		8,410		8,790
Basic earnings per common share		0.30		0.25		0.25		0.26
Diluted earnings per common share		0.30		0.25		0.25		0.26

The sum of the basic earnings per common share for the

2015

and

2016

quarters is less than the basic earnings per common share for each of

2015

and

2016

due to differences in rounding.