Long-Term Obligations - Schedule of Long-Term Obligations (Parenthetical) (Detail)	1 Months Ended	9 Months Ended
	Aug. 29, 2013	Sep. 30, 2013
2010 Senior Credit Facility Term Loan Due 2016 [Member]
Long Term Debt Current And Noncurrent [Line Items]
Maturity year of senior credit facility term loan - start		2010
Maturity year of senior credit facility term loan - end		2016
6.25% Convertible Notes Due 2018 [Member]
Long Term Debt Current And Noncurrent [Line Items]
Interest rate of convertible notes	6.25%	6.25%
Maturity year of convertible notes	2018	2018
5.75% Convertible Notes Due 2013 [Member]
Long Term Debt Current And Noncurrent [Line Items]
Interest rate of convertible notes		5.75%
Maturity year of convertible notes		2013