Quarterly Financial Information (unaudited) (Tables)

12 Months Ended

Dec. 31, 2012

Quarterly Financial Information (unaudited)

Schedule of selected quarterly information

The table below reflects the selected quarterly information for the years ended December 31, 2012 and 2011 (in thousands except share data):

	Three Months Ended
	December 31,		September 30,		June 30,		March 31,
	2012		2012		2012		2012
Revenue	$	55,252	$	53,762	$	50,636	$	47,284
Operating income	5,936		5,059		3,814		2,234
Net income	4,578		2,947		1,848		1,343
Net income attributable to common shares	1,862		1,320		826		600
Net income per share attributable to common shares - basic	$	0.09	$	0.06	$	0.04	$	0.03
Net income per share attributable to common shares - diluted	$	0.09	$	0.06	$	0.04	$	0.03

	Three Months Ended
	December 31,		September 30,		June 30,			March 31,
	2011		2011		2011			2011
Revenue	$	46,029	$	44,367	$	42,484		$	39,966
Operating income (loss)	1,072		1,125		(3,473		)	(5,814		)
Net income (loss)	462		263		(3,588		)	(7,916		)
Net income (loss) attributable to common shares	179		112		(1,530		)	(3,372		)
Net income (loss) per share attributable to common shares - basic	$	0.01	$	0.01	$	(0.08	)	$	(0.17	)
Net income (loss) per share attributable to common shares - diluted	$	0.01	$	0.01	$	(0.08	)	$	(0.17	)