Industrial Revenue Bond (Detail) (USD $)	0 Months Ended	3 Months Ended
	Dec. 28, 2006	Mar. 31, 2015
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%