Derivative Instruments and Hedging Activities - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	1 Months Ended	3 Months Ended
May 31, 2013 Interest Rate Cap BasisPoint	Feb. 28, 2013 Fixed to Floating Interest Rate Swap Y	May 31, 2013 Maximum
Interest Rate Risk [Line Items]
Percentage of term loan portion required to fix interest rate swap	50.00%
Senior leverage ratio by May 31, 2014 to reduce the requirement to fix or cap interest rate to one year period	2.50100
Increase in interest expense			$ 0.1
Interest Rate Swap Term		2
Interest Rate Swap Notional Principal Amount		40
Fixed rate payable on interest rate swap		0.42%
Accumulated other comprehensive loss balance related to derivative instruments			$ 0.1

The increase (decrease) during the reporting period in interest payable, which represents the amount owed to note holders, bond holders, and other parties for interest earned on loans or credit extended to the reporting entity.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 28

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

Name:	us-gaap_IncreaseDecreaseInInterestPayableNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration