Long-term Debt - Additional Information 1 (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
7 3/4% senior notes due 2019
Debt Instrument [Line Items]
Outstanding senior notes	$ 300.0
Interest rate on senior notes	7.75%
Maturity of senior notes	Apr. 01, 2019
9 1/2% senior notes due 2020
Debt Instrument [Line Items]
Outstanding senior notes	$ 300.0
Interest rate on senior notes	9.50%
Maturity of senior notes	Jun. 15, 2020
Bank credit facility
Debt Instrument [Line Items]
Ownership percentage of guarantor subsidiary	100.00%