Quarterly Financial Information - Summary of Unaudited Interim Results of Operations (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended	0 Months Ended	3 Months Ended			9 Months Ended	3 Months Ended					12 Months Ended
	Dec. 31, 2012	Mar. 31, 2012 Successor [Member]	Dec. 31, 2012 Successor [Member]	Sep. 30, 2012 Successor [Member]	Jun. 30, 2012 Successor [Member]	Dec. 31, 2012 Successor [Member]	Mar. 19, 2012 Predecessor [Member]	Dec. 31, 2011 Predecessor [Member]	Sep. 30, 2011 Predecessor [Member]	Jun. 30, 2011 Predecessor [Member]	Mar. 31, 2011 Predecessor [Member]	Dec. 31, 2011 Predecessor [Member]	Dec. 31, 2010 Predecessor [Member]
Total Revenue		$ 1,922	$ 4,582	$ 7,336	$ 7,447	$ 21,287	$ 9,349	$ 10,247	$ 9,103	$ 13,208	$ 10,823	$ 43,381	$ 65,422
Net Income (Loss)	$ (15,800)	$ 472	$ (9,951)	$ 5,299	$ (8,173)	$ (12,353)	$ (3,433)	$ (1,350)	$ (6,264)	$ (1,368)	$ (1,891)	$ (10,873)	$ 5,412
Earnings per share - basic and diluted		$ 0.00	$ (0.05)	$ 0.03	$ (0.04)	$ (0.06)	$ (3,433.00)	$ (1,350.00)	$ (6,264.00)	$ (1,368.00)	$ (1,891.00)	$ (10,873.00)	$ 5,412.00