Note 16 - Quarterly Financial Data (Unaudited)

12 Months Ended

Dec. 31, 2013

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Information [Text Block]

16. Quarterly Financial Data (Unaudited)

The following is a summary of the quarterly results of operations for 2013 and 2012:

2013 Quarters (In thousands, except per share amounts)	First		Second		Third		Fourth
Operating revenue	$	164,474	$	161,413	$	167,103	$	166,224
Operating income		12,538		13,121		13,653		12,683
Net income		7,202		7,667		7,977		7,301
Basic earnings per common share		0.22		0.23		0.24		0.22
Diluted earnings per common share		0.22		0.23		0.24		0.22

2012 Quarters (In thousands, except per share amounts)	First		Second		Third		Fourth
Operating revenue	$	151,474	$	156,964	$	163,606	$	166,412
Operating income		9,519		13,283		9,840		13,211
Net income		5,446		7,584		6,518		7,719
Basic earnings per common share		0.16		0.23		0.20		0.23
Diluted earnings per common share		0.16		0.23		0.20		0.23

              The sum of the diluted earnings per common share for the 2013 quarters exceeds the diluted earnings per common share for 2013, due to differences in rounding.