Derivatives and Hedging Activities - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended			3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014	Sep. 30, 2012	Oct. 16, 2014	Nov. 30, 2012
Derivative [Line Items]
Cash received from terminated interest rate swaps	$ 3.1
Number of derivative instruments outstanding			0
Designated as Hedging Instruments [Member]
Derivative [Line Items]
Reduction of interest expense due to interest rate swap	2
Maximum [Member] | Designated as Hedging Instruments [Member]
Derivative [Line Items]
Reduction of interest expense due to interest rate swap		1	1
6.50% Senior Notes Due December 2020 [Member]
Derivative [Line Items]
Debt interest rate	6.50%	6.50%		6.50%		6.50%	6.50%
Gain on termination of interest rate swap				3
12% Senior Notes Due February 2014 [Member]
Derivative [Line Items]
Debt interest rate	12.00%	12.00%		12.00%	12.00%
Cash received from terminated interest rate swaps					2.0
Delayed Draw Term Loan A Facility [Member]
Derivative [Line Items]
Notional amount of outstanding interest rate swaps	100			100
Foreign Exchange Option [Member
Derivative [Line Items]
Maximum original maturity period of foreign currency forward contracts	12 months
Number of derivative instruments outstanding	0	0	0	0
Interest Rate and Currency Swap [Member]
Derivative [Line Items]
Notional amount of outstanding interest rate swaps	$ 100			$ 100
Currency Swap Agreements [Member]
Derivative [Line Items]
Number of derivative instruments outstanding	0	0	0	0
Interest Rate Swaps [Member]
Derivative [Line Items]
Number of derivative instruments outstanding	0	0	0	0