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Note 18 - Quarterly Results of Operations (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2013

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information [Table Text Block]

		2013 Three Months Ended
		March 31				June 30				September 30				December 31
		(in thousands, except per share data)

Operating revenues		$	99,982			$	104,408			$	101,878			$	96,545
Operating expenses and costs			100,234				99,402				97,194				94,477

Operating income (loss)			(252	)			5,006				4,684				2,068
Non-operating income			283				289				130				838
Interest expense			815				880				846				834
Income tax (benefit) expense			(328	)			1,733				1,575				776

Net (loss) income		$	(456	)		$	2,682			$	2,393			$	1,296

Net (loss) income per common share:
Basic		$	(0.05	)		$	0.31			$	0.28			$	0.15
Diluted		$	(0.05	)		$	0.31			$	0.28			$	0.15

Average common shares outstanding:
Basic			8,688				8,658				8,654				8,649
Diluted			8,688				8,659				8,663				8,683

		2012 Three Months Ended
		March 31				June 30				September 30				December 31
		(in thousands, except per share data)

Operating revenues		$	96,155			$	94,156			$	94,549			$	95,773
Operating expenses and costs			95,069				92,884				93,610				96,167

Operating income (loss)			1,086				1,272				939				(394	)
Non-operating income			594				895				1,188				611
Interest expense			561				605				645				785
Income tax expense (benefit)			445				627				601				(257	)

Net income (loss)		$	674			$	935			$	881			$	(311	)

Net income (loss) per common share:
Basic		$	0.08			$	0.11			$	0.10			$	(0.04	)
Diluted		$	0.08			$	0.11			$	0.10			$	(0.04	)

Average common shares outstanding:
Basic			8,696				8,702				8,702				8,702
Diluted			8,698				8,703				8,703				8,702