Reorganization Under Chapter 11 - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		5 Months Ended	9 Months Ended	4 Months Ended
	Sep. 30, 2014 Successor [Member]	Sep. 30, 2013 Successor [Member]	Sep. 30, 2013 Successor [Member]	Sep. 30, 2014 Successor [Member]	Apr. 30, 2013 Predecessor [Member]
Fresh-Start Adjustment [Line Items]
Debtor Reorganization Items, Debtor-in-Possession Facility Financing Costs	$ 0	$ 13	$ 13	$ 0	$ 23
Debtor Reorganization Items, Legal and Advisory Professional Fees	2	(9)	415	211	4,483
Debtor Reorganization Items, Gain (Loss) on Settlement of Other Claims, Net	0	0	0	0	(1,521,435)
Debtor Reorganization Items Fresh Start Adjustments	0	0	0	0	(1,228,251)
Pre-tax (loss) income from continuing operations	$ 2	$ 4	$ 428	$ 211	$ (2,745,180)