Derivative Instruments and Hedging Activities - Additional Information (Detail) (Interest Rate Swap [Member], USD $) In Millions, unless otherwise specified	1 Months Ended
Dec. 23, 2008
Derivative [Line Items]
Notional amount of cash flow hedge instruments	$ 20.0
Cash Flow Hedge [Member]
Derivative [Line Items]
Fixed interest rate paid on cash flow hedge	2.65%
Derivative, maturity date	Jan. 07, 2019
Variable interest rate received on cash flow hedge	Three-month LIBOR

Nominal or face amount used to calculate payments on the derivative asset.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1B

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5580258-113959

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1A

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5579245-113959

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Notional Amount

-URI http://asc.fasb.org/extlink&oid=6519104

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Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant