Quarterly Financial Information - Summary of Unaudited Interim Results of Operations (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	0 Months Ended	3 Months Ended											9 Months Ended	12 Months Ended		3 Months Ended
	Mar. 31, 2012	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Dec. 31, 2012	Dec. 31, 2014	Dec. 31, 2013	Mar. 19, 2012
Successor [Member]
Quarterly Financial Information [Line Items]
Total revenue	$ 1,922	$ 1,843	$ 1,721	$ 2,150	$ 2,834	$ 3,318	$ 3,723	$ (974)	$ 4,101	$ 4,582	$ 7,336	$ 7,447	$ 21,287	$ 8,548	$ 10,168
Net income (loss) attributable to common shareholders	472	(9,573)	(1,299)	17,322	(12,835)	7,516	(878)	(2,484)	(3,816)	(9,951)	5,299	(8,173)	(12,353)	(6,385)	338
Earnings per share - basic	$ 0.00	$ (0.05)	$ (0.01)	$ 0.09	$ (0.06)	$ 0.04	$ (0.01)	$ (0.01)	$ (0.02)	$ (0.05)	$ 0.03	$ (0.04)	$ (0.06)	$ (0.03)	$ 0.00
Earnings per share - diluted	$ 0.00	$ (0.05)	$ (0.01)	$ 0.07	$ (0.06)	$ 0.04	$ (0.01)	$ (0.01)	$ (0.02)	$ (0.05)	$ 0.03	$ (0.04)	$ (0.06)	$ (0.03)	$ 0.00
Predecessor [Member]
Quarterly Financial Information [Line Items]
Total revenue																9,349
Net income (loss) attributable to common shareholders																$ (3,433)
Earnings per share - basic																$ (3,433.00)
Earnings per share - diluted																$ (3,433.00)