Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended	9 Months Ended	12 Months Ended	3 Months Ended
	Dec. 31, 2014	Dec. 31, 2012	Dec. 31, 2013	Mar. 19, 2012
Income Taxes And Tax Related [Line Items]
Income tax at the federal statutory rate of 35%	35.00%
Successor [Member]
Income Taxes And Tax Related [Line Items]
Income tax at the federal statutory rate of 35%	35.00%	(35.00%)	35.00%
Worthless stock deduction		$ (23,718)	$ 13
Cancelation of debt		2,401
As filed adjustments			(14,505)
Adjustments to NOL due to 382 limitation	(9)	4,518
Change in valuation allowance	(26)	16,834	14,457
Predecessor [Member]
Income Taxes And Tax Related [Line Items]
Income tax at the federal statutory rate of 35%				(35.00%)
Change in valuation allowance				$ 35