Quarterly Financial Information (Unaudited) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended									12 Months Ended
	Dec. 31, 2010	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Total Revenues		$ 34,627	$ 34,486	$ 35,389	$ 32,877	$ 25,632	$ 20,396	$ 24,890	$ 23,874
Operating income (loss)		5,618	5,250	2,985	2,702	3,672	2,254	600	729
Net income (loss)		2,268	9,050	460	(980)	4,483	414	(641)	(474)
Net income (loss) attributable to common stockholders	(1,591)	1,110	7,839	(676)	(1,635)	4,433	408	(638)	(472)	6,638	3,730
Net income (loss) attributable to common stockholders per share - basic and diluted		$ 0.03	$ 0.20	$ (0.02)	$ (0.05)	$ 0.14	$ 0.01	$ (0.02)	$ (0.02)
Successor [Member]
Total Revenues	10,860									137,379	94,793
Operating income (loss)	147									16,555	7,254
Net income (loss)	(1,605)									10,798	3,781
Net income (loss) attributable to common stockholders	$ (1,591)									$ 6,638	$ 3,730