Reorganization Under Chapter 11 - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	2 Months Ended	3 Months Ended	6 Months Ended	1 Months Ended	4 Months Ended
	Jun. 30, 2013 Successor [Member]	Jun. 30, 2014 Successor [Member]	Jun. 30, 2014 Successor [Member]	Apr. 30, 2013 Predecessor [Member]	Apr. 30, 2013 Predecessor [Member]
Fresh-Start Adjustment [Line Items]
Debtor Reorganization Items, Debtor-in-Possession Facility Financing Costs	$ 0	$ 0	$ 0	$ 13	$ 23
Debtor Reorganization Items, Legal and Advisory Professional Fees	424	186	209	2,434	4,483
Debtor Reorganization Items, Gain (Loss) on Settlement of Other Claims, Net	0	0	0	(1,521,435)	(1,521,435)
Debtor Reorganization Items Fresh Start Adjustments	0	0	0	(1,228,251)	(1,228,251)
Reorganization items	$ 424	$ 186	$ 209	$ (2,747,239)	$ (2,745,180)