Goodwill and Intangible Assets - Additional Information (Detail) (USD $)	12 Months Ended		2 Months Ended	10 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Oct. 30, 2012
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment loss	$ 0
Amount of goodwill expected to be deductible for tax purpose	5,700,000
Amortization expense	11,300,000	4,600,000
Predecessor [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense			$ 300,000	$ 1,900,000