Selected Quarterly Financial Data (Tables)

12 Months Ended

Dec. 31, 2012

Quarterly Financial Information Disclosure [Abstract]

Schedule of quarterly financial information

The following table sets forth selected unaudited financial information for the eight quarters in the two-year period ended December 31, 2012.  This information has been prepared on the same basis as the audited financial statements and, in the opinion of management, contains all adjustments necessary for a fair presentation.

	First Quarter			Second Quarter			Third Quarter			Fourth Quarter		Total Year
	(in thousands, except per share data)
2012
Revenues	$	50,890		$	67,132		$	75,386		$	98,634	$	292,042
Operating (loss) income	(9,918		)	(7,695		)	(2,293		)	5,703		(14,203		)
(Loss) income before income taxes	(9,895		)	(7,918		)	(2,480		)	3,787		(16,506		)
Net (loss) income	(6,336		)	(5,421		)	(1,595		)	1,486		(11,866		)
Net income attributable to noncontrolling interest	—			—			—			—		—
Net i(loss) income attributable to common stockholders	(6,336		)	(5,421		)	(1,595		)	1,486		(11,866		)
Earnings (loss) per share:
Basic	$	(0.23	)	$	(0.20	)	$	(0.06	)	$	0.05	$	(0.44	)
Diluted	$	(0.23	)	$	(0.20	)	$	(0.06	)	$	0.05	$	(0.44	)

	First Quarter		Second Quarter			Third Quarter			Fourth Quarter			Total Year
	(in thousands, except per share data)
2011
Revenues	$	79,057	$	70,899		$	54,583		$	55,313		$	259,852
Operating income (loss)	2,524		(5,265		)	(9,062		)	(7,478		)	(19,281		)
Income (loss) before income taxes	2,448		(5,340		)	(9,108		)	(7,461		)	(19,461		)
Net income (loss)	1,539		(3,216		)	(6,218		)	(5,219		)	(13,114		)
Earnings per share:
Basic	$	0.06	$	(0.12	)	$	(0.23	)	$	(0.19	)	$	(0.49	)
Diluted	$	0.06	$	(0.12	)	$	(0.23	)	$	(0.19	)	$	(0.49	)