Debt - Additional Information (Detail) - USD ($)		6 Months Ended
	Jul. 14, 2017	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016
Line of Credit Facility [Line Items]
Asset-based senior secured revolving credit		$ 160,000,000
Revolving credit borrowing		100,700,000	$ 52,200,000	$ 73,800,000
Letters of credit outstanding		3,200,000
Capital lease and other obligations		3,700,000	$ 3,300,000	$ 2,200,000
Minimum [Member]
Line of Credit Facility [Line Items]
Fall of excess committed borrowing availability		12,500,000
Maximum [Member]
Line of Credit Facility [Line Items]
Fall of excess committed borrowing availability		$ 20,000,000
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit facility maturity date		May 28, 2019
Amortization period on real estate component of borrowing base		12 years 6 months
Revolving credit borrowing		$ 100,700,000
Weighted average interest rate		2.80%
Excess committed borrowing capacity		$ 56,100,000
Unused commitment fees		0.25%
Fixed charge coverage ratio of credit facility		105.00%
Revolving Credit Facility [Member] | Subsequent Event [Member]
Line of Credit Facility [Line Items]
Fixed charge coverage ratio of credit facility	100.00%
Line of credit facility, expiration period	5 years
Line of credit facility, expiration date	Jul. 14, 2022
Line of credit facility, increased borrowing capacity	$ 12,000,000
Revolving Credit Facility [Member] | Asset Backed Securities [Member] | Subsequent Event [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 250,000,000