Long Term Debt - Additional Information (Detail) (USD $) In Millions, unless otherwise specified					9 Months Ended				3 Months Ended		9 Months Ended					3 Months Ended	7 Months Ended	9 Months Ended
	Sep. 30, 2014	Jul. 28, 2014	Jun. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 Revolving Credit Facilities [Member]	Oct. 29, 2014 Revolving Credit Facilities [Member]	Jul. 28, 2014 Revolving Credit Facilities [Member]	Dec. 31, 2013 Revolving Credit Facilities [Member]	Sep. 30, 2014 Term Loan [Member]	Sep. 30, 2013 Term Loan [Member]	Sep. 30, 2014 Term Loan [Member]	Sep. 30, 2013 Term Loan [Member]	Dec. 31, 2013 Term Loan [Member]	Sep. 30, 2014 Promissory Notes [Member]	Dec. 31, 2013 Promissory Notes [Member]	Sep. 30, 2014 Second Lien Credit Agreement Term Loan [Member]	Jul. 28, 2014 Second Lien Credit Agreement Term Loan [Member]	Sep. 30, 2014 Second Lien Credit Agreement Term Loan [Member]	Dec. 31, 2013 Second Lien Credit Agreement Term Loan [Member]
Debt Instrument [Line Items]
Term loan, period											5 years
Weighted-average interest rate for debt									3.40%	2.70%	3.40%	2.70%				8.50%
Total leverage ratio	2.1
Fixed charge coverage ratio	1.8
Principal amount					$ 120.0		$ 120.0		$ 60.0		$ 60.0					$ 70.0	$ 70.0	$ 70.0
Availability under the revolving credit facility						55.7
Outstanding letters of credit						19.3
Credit facility, maximum borrowing capacity		120.0	165.0
Maturity date					Oct. 26, 2017						Oct. 26, 2017							Jul. 28, 2020
Debt Instrument Periodic Payment Principal											3.0
Long-term debt including current portion	114.3			46.9	10.0			0	36.0		36.0		45.0	0	1.9	70.0		70.0	0
Proceeds From Issuance Of Debt																	$ 67.4
Senior Secured Leverage Ratio	1.2