Subsequent Event - Additional Information (Detail) (Discontinued Operation or Asset Disposal, USD $) In Millions, unless otherwise specified	Apr. 04, 2012	Dec. 31, 2011
Discontinued Operation or Asset Disposal
Subsequent Event [Line Items]
Sell of facility, price	$ 1.5
Book value of facility held for sale	1.8
Impairment charge on held for sale facility		0.4
Estimated selling costs of facility held for sale		$ 0.1

Amounts received from the disposal of the long-lived asset during or after the reporting period.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 144

-Paragraph 33, 47

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 360

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2941-110230

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760

Name:	us-gaap_LongLivedAssetsHeldForSaleProceedsFromSale
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant