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Long-Term Debt - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified |
1 Months Ended | 3 Months Ended | 3 Months Ended | 3 Months Ended | 3 Months Ended | 1 Months Ended | 3 Months Ended | 3 Months Ended | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Dec. 14, 2012
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Dec. 14, 2012
Secured Debt [Member]
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Mar. 31, 2013
Secured Debt [Member]
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Dec. 31, 2012
Secured Debt [Member]
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Mar. 31, 2013
Revolving Credit Facility [Member]
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Dec. 31, 2012
Revolving Credit Facility [Member]
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Mar. 31, 2013
9.125% Senior Notes, due April 2018 [Member]
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Dec. 31, 2012
9.125% Senior Notes, due April 2018 [Member]
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Mar. 22, 2010
9.125% Senior Notes, due April 2018 [Member]
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Mar. 31, 2013
9.625% Senior Notes due 2013 [Member]
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Mar. 31, 2013
Senior secured revolving credit facility (Revolver) [Member]
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Apr. 30, 2012
9.125% Senior Notes, due April 2018 (Issued April 25, 2012) [Member]
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Mar. 31, 2013
9.125% Senior Notes, due April 2018 (Issued April 25, 2012) [Member]
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Apr. 25, 2012
9.125% Senior Notes, due April 2018 (Issued April 25, 2012) [Member]
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May 09, 2012
2.125% Convertible Senior Notes due July 2012 [Member]
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Mar. 31, 2013
2.125% Convertible Senior Notes due July 2012 [Member]
2.125% Convertible Senior Notes, due July 2012 Repayment of Debt [Member]
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Jul. 15, 2012
2.125% Convertible Senior Notes, due July 2012 [Member]
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Mar. 31, 2013
Term Note [Member]
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Dec. 14, 2012
Term Note [Member]
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Dec. 14, 2012
Term Note [Member]
Secured Debt [Member]
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| Debt Instrument [Line Items] | ||||||||||||||||||||
| Aggregate principal amount | $ 300.0 | $ 125.0 | ||||||||||||||||||
| Percentage of notes guaranteed by restricted subsidiaries | 9.125% | 9.125% | 9.625% | 2.125% | ||||||||||||||||
| Repayments of debt | 225.0 | 42.0 | ||||||||||||||||||
| Par value of senior notes | 104.00% | |||||||||||||||||||
| Gross proceeds of aggregate principal amount additional issued | 130.0 | |||||||||||||||||||
| Repurchase of Convertible senior notes | 122.9 | |||||||||||||||||||
| Notes paid off | 2.1 | |||||||||||||||||||
| Debt issuance costs | 11.6 | |||||||||||||||||||
| Debt issuance cost, Net of amortization | 7.2 | |||||||||||||||||||
| Percentage of the aggregate principal amount redeemed | 35.00% | |||||||||||||||||||
| Percentage of redemption price before notice | 109.125% | |||||||||||||||||||
| Percentage of redemption price after notice | 104.563% | |||||||||||||||||||
| Percentage of repurchase | 101.00% | |||||||||||||||||||
| Redemption date | Apr. 01, 2014 | |||||||||||||||||||
| Senior secured credit facility | 80.0 | 50.0 | ||||||||||||||||||
| Increase in the amount of term loan or revolving credit facility | 50.0 | |||||||||||||||||||
| Aggregate commitment amount | 180.0 | |||||||||||||||||||
| Maturity of credit facility | Dec. 14, 2017 | |||||||||||||||||||
| Variation in applicable rate for LIBOR Rate Loan | 2.50% | |||||||||||||||||||
| Variation in applicable rate for LIBOR Rate Loan | 3.00% | |||||||||||||||||||
| Variation in applicable rate for Base Rate Loan | 1.50% | |||||||||||||||||||
| Variation in applicable rate for Base Rate Loan | 2.00% | |||||||||||||||||||
| Revolving loan outstanding | 47.5 | 50.0 | 0 | 0 | ||||||||||||||||
| Letters of credit outstanding | 2.8 | 4.5 | ||||||||||||||||||
| Term Loan | 50.0 | |||||||||||||||||||
| Principal payments | $ 2.5 | |||||||||||||||||||
| Base rate plus | 2.00% | |||||||||||||||||||
| LIBOR plus | 3.00% | |||||||||||||||||||