Condensed Consolidating Financial Information - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2015	Jun. 30, 2014
Condensed Consolidating Financial Information [Line Items]
Net cash provided by operating activities		$ 35.7	$ 13.4
Net cash used in investing activities		0.4	(14.0)
Guarantor Subsidiaries [Member]
Condensed Consolidating Financial Information [Line Items]
Net cash provided by operating activities		(1.6)	12.5
Net cash used in investing activities		$ 0.4	(13.8)
Restatement Adjustment [Member]
Condensed Consolidating Financial Information [Line Items]
Net cash provided by operating activities			1.8
Net cash used in investing activities			(1.8)
Restatement Adjustment [Member] | Guarantor Subsidiaries [Member]
Condensed Consolidating Financial Information [Line Items]
Net cash provided by operating activities			1.8
Net cash used in investing activities			$ (1.8)
ABL Facility [Member]
Condensed Consolidating Financial Information [Line Items]
Ownership percentage of equity holdings		100.00%
Senior Secured Notes [Member]
Condensed Consolidating Financial Information [Line Items]
Ownership percentage of equity holdings	100.00%