Long-Term Debt - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended				12 Months Ended		12 Months Ended				12 Months Ended							12 Months Ended				0 Months Ended			12 Months Ended		12 Months Ended		0 Months Ended
	Nov. 30, 2013	Nov. 30, 2012	Aug. 16, 2012	May 30, 2012	Nov. 30, 2013 Minimum [Member]	May 30, 2012 Minimum [Member]	Nov. 30, 2013 Minimum [Member] Till November 30, 2014 [Member]	Nov. 30, 2013 Minimum [Member] Thereafter [Member]	Nov. 30, 2013 Maximum [Member]	May 30, 2012 Maximum [Member]	Nov. 30, 2013 Maximum [Member] Till November 30, 2014 [Member]	Nov. 30, 2013 Maximum [Member] Thereafter [Member]	Nov. 30, 2013 Senior Credit Facility [Member] BasisPoint	Nov. 30, 2013 Revolving Credit Facility [Member] BasisPoint	Nov. 30, 2013 7.125% Second-Priority Senior Secured Notes [Member]	Jun. 28, 2013 7.125% Second-Priority Senior Secured Notes [Member]	Jan. 28, 2013 7.125% Second-Priority Senior Secured Notes [Member]	Nov. 30, 2013 Convertible Subordinated Debentures, Bearing Interest at 2.25% Maturing in November 2024 [Member]	Nov. 30, 2012 Convertible Subordinated Debentures, Bearing Interest at 2.25% Maturing in November 2024 [Member]	Nov. 30, 2013 2.25% Convertible Subordinated Debentures [Member]	Nov. 30, 2011 2.25% Convertible Subordinated Debentures [Member]	Dec. 31, 2009 Convertible Subordinated Debentures, Bearing Interest at 4.0625% Maturing in December 2039 [Member]	Nov. 30, 2013 Convertible Subordinated Debentures, Bearing Interest at 4.0625% Maturing in December 2039 [Member]	Nov. 30, 2012 Convertible Subordinated Debentures, Bearing Interest at 4.0625% Maturing in December 2039 [Member]	Nov. 30, 2013 Convertible Subordinated Debentures, Bearing Interest at 4.0625% Maturing in December 2034 [Member]	Nov. 30, 2012 Convertible Subordinated Debentures, Bearing Interest at 4.0625% Maturing in December 2034 [Member]	Nov. 30, 2013 Convertible Subordinated Debentures, Bearing Interest at 4.0625% Maturing in December 2034 [Member] Minimum [Member]	Nov. 30, 2013 Convertible Subordinated Debentures, Bearing Interest at 4.0625% Maturing in December 2034 [Member] Maximum [Member]	Jan. 14, 2013 Third Amendment [Member]
Debt Instrument [Line Items]
Term loan borrowings under revolving credit facility				$ 50.0
Sale leasebacks						20.0				30.0
Second lien indebtedness			510
Maximum term loan to draw			50
Senior Credit Facility aggregate principal amount																													250.0
Term loan facility principal amount	42.5	45.0																											50.0
Revolving credit facility aggregate principal amount																													150.0
Term loan borrowing under revolving credit facility																													50.0
Term of revolving credit facility																													5 years
Term of loan facility																													5 years
Standby letters of credit	100.0
Swingline loans	5.0
Term loan facility amortize percentage					5.00%
Outstanding letters of credit	58.1
Standby letters of credit outstanding	100.0
Outstanding under the term loan facility	45.0
Interest at LIBOR plus basis points													3.50%	3.50%
Commitment fee basis points													50
Interest rate addition to base rate													2.50%
Debt instrument, fronting fee per annum, basis points														25
Percentage of equity interests owned or held by the loan parties	66.00%
Percentage of non-voting stock owned or held by the loan parties	100.00%
Financial covenants that the borrower maintains, net of cash									100.0
Maximum total leverage ratio							4.25	4.00			1.00	1.00
Minimum interest coverage ratio					2.40				1.00
Aggregate principal amount	193.2	200.2														460.0	460.0					200.0	193.2	200.0
Convertible subordinated debentures, bearing interest															7.125%	7.125%	7.125%	2.25%		2.25%	2.25%	4.0625%	4.0625%		4.0625%	4.0625%
Debentures price range															100.00%										100.00%		176.00%	195.00%
Redemption price rate on principal amount															35.00%
Redemption price percentage of aggregate principal amount															107.125%
Percentage of ownership interest in subsidiary	100.00%
Debt instrument repurchase price rate on principal amount															101.00%
Percentage of ownership interest															25.00%
Aggregate principal amount																		0.2	0.2
Discount rate																		8.86%
Carrying value of the liability																		97.5
Equity component or debt discount of the debentures																		48.9
Debentures repurchase date																		Nov. 20, 2011
Debentures issuance cost	4.9
Deferred financing costs	18.3	7.0																		3.3
Equity issuance costs	1.6
Debentures maturity period																						Dec. 13, 2039
Number of shares required to convert debentures into shares for a specific principal amount	111.0926
Principal amount for conversion of debentures into shares	$ 1,000
Debentures conversion price	$ 9.00
Percentage of Company's common stock redemption, conversion price																									150.00%
Repurchase price of debentures																									100.00%
Interest payment or any make-whole premium	5.00%
Optional repurchase percentage	2.50%
Daily volume weighted average price per share	97.50%
Net proceeds from issuance of Debentures	194.1
Amount of Debentures converted to common stock	1.6																								1.6
Debentures repurchased, principal amount																									$ 5.2