Note 17 - Quarterly Results of Operations (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2014

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information [Table Text Block]

	(in thousands except per share amounts)
Quarters ended	Mar. 31, 2014			June 30, 2014		Sep. 30, 2014 (3)		Dec. 31, 2014
Total revenue	$	160,957		$	173,654	$	177,581	$	206,788
Operating income		354			9,056		5,586		24,650
Net income (loss)		(1,374	)		3,780		1,857		13,545
Basic and diluted (loss) income per share		-			-		-		-
Basic (loss) income per share (1)		(0.09	)		0.25		0.12		0.84
Diluted (loss) income per share (1)		(0.09	)		0.25		0.12		0.82

	(in thousands except per share amounts)
Quarters ended	Mar. 31, 2013 (2)			June 30, 2013		Sep. 30, 2013		Dec. 31, 2013
Total revenue	$	164,731		$	172,488	$	170,843	$	176,487
Operating income		(715	)		6,350		5,882		8,877
Net (loss) income		(1,959	)		1,891		1,973		3,339
Basic and diluted (loss) income per share		(0.13	)		0.13		0.13		0.22
Basic (loss) income per share		-			-		-		-
Diluted (loss) income per share		-			-		-		-