Long-Term Debt (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Debt Instrument [Line Items]
Total Debt	$ 591,311	$ 602,560
Current portion, long-term debt	18,750	15,000
Long-term debt	572,561	587,560
Senior Secured Revolving Credit Facility
Debt Instrument [Line Items]
Total Debt	50,000	50,000
Senior Secured Term Loan A
Debt Instrument [Line Items]
Total Debt	281,250	292,500
Senior Secured Convertible Notes due 2033, net of discount
Debt Instrument [Line Items]
Total Debt	61	60
Senior Notes due 2021
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.625%	6.625%
Total Debt	$ 260,000	$ 260,000

Interest rate stated in the contractual debt agreement.

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