Debt - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Line of Credit Facility [Line Items]
Asset-based senior secured revolving credit	$ 160,000,000
Revolving credit borrowing	52,200,000	$ 46,100,000
Letters of credit outstanding	3,000,000
Capital leases and other obligations	3,300,000	2,500,000
Long-term debt, Fair value	52,200,000	$ 46,100,000
Minimum [Member]
Line of Credit Facility [Line Items]
Fall of excess borrowing availability	12,500,000
Maximum [Member]
Line of Credit Facility [Line Items]
Fall of excess 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	$ 52,200,000
Weighted average interest rate	2.27%
Additional committed borrowing capacity	$ 76,500,000
Unused commitment fees	0.25%
Fixed charge coverage ratio of credit facility	105.00%