Long-term Debt - Narrative - Delayed Draw Term Loan (Detail) (Delayed Draw Term Loan [Member], USD $) In Millions, unless otherwise specified	9 Months Ended
Aug. 31, 2014	Apr. 18, 2014	Nov. 30, 2013
Delayed Draw Term Loan [Member]
Debt Instrument [Line Items]
Term loan borrowings under credit facility		$ 100.0
Interest at greater of LIBOR	1.00%
Interest at LIBOR plus basis points	8.50%
Interest rate addition to base rate	7.50%
Term loan facility outstanding amount	$ 89.0		$ 0

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant