Long-term Debt and Financing Arrangements - Additional Information (Detail)		9 Months Ended
	May. 05, 2015 USD ($)	Sep. 30, 2015 USD ($)	May. 04, 2015 USD ($)	Dec. 31, 2014	Feb. 20, 2014 USD ($)	Feb. 18, 2014 USD ($)
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 100,000,000	$ 100,000,000	$ 35,000,000		$ 100,000,000
Line of credit facility maximum borrowing capacity increased value	100,000,000
Line of credit facility maximum borrowing capacity possible value of increase (not to exceed)	$ 50,000,000
Credit facility fixed charge coverage ratio		2.0
Required consolidated leverage ratio as of end of each fiscal quarter		3.0
Required Consolidated EBITDA		$ 30,000,000.0
Line of credit facility, remaining borrowing capacity		58,100,000
Standby letters of credit, outstanding		$ 1,900,000
Debt, weighted average interest rate (percent)		1.30%		1.50%
Federal Funds Effective Swap Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate		0.50%
Eurocurrency Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate		1.00%
Minimum [Member]
Debt Instrument [Line Items]
Fee percentage on unused portion of credit facility		0.20%
Minimum [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate		0.15%
Minimum [Member] | Eurocurrency Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate		0.75%
Maximum [Member]
Debt Instrument [Line Items]
Fee percentage on unused portion of credit facility		0.30%
Maximum [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate		1.00%
Maximum [Member] | Eurocurrency Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate		1.75%
Domestic Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity						$ 35,000,000.0