Industrial Revenue Bond (Detail) (USD $)	0 Months Ended	9 Months Ended
Dec. 28, 2006	Sep. 30, 2014
Debt Instrument [Line Items]
Real property tax abatement period	10 years
Special assessment bond	$ 7,000,000
Industrial revenue bonds balloon payment		7,000,000
Capital leases end of lease bargain purchase price		100
Municipal administrative fee		50,000
Industrial Revenue Bonds [Member]
Debt Instrument [Line Items]
Municipal administrative fee payment period		10 years
Accelerated Payment Terms [Member]
Debt Instrument [Line Items]
Municipal administrative fee		$ 50,000
Industrial Revenue Bonds [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage (percent)	4.90%

Including the current and noncurrent portions, carrying value as of the balance sheet date of a type of municipal bond typically used to fund a development project. Also called special assessment limited liability bond, special district bond, special purpose bond, special tax bond and community development obligation. Interest owed to lenders is paid by taxes levied on the community benefiting from the particular bond-funded project. For example, if a bond of this sort was issued to pay for sidewalks to be repaved in a certain community, an additional tax would be levied on homeowners in the area benefiting from this project.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Article 5

-Subsection 20, 22

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 13, 16

-Article 9

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