Long-Term Debt - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Line of Credit Facility [Line Items]
Asset based senior secured revolving credit	$ 120,000,000
Credit facility maturity date	Dec. 21, 2017
Revolving credit borrowing	62,000,000	59,800,000
Weighted average interest rate	2.85%
Letters of credit outstanding	3,600,000
Additional committed borrowing capacity	41,200,000
Capital lease and other obligations	2,200,000
Fixed charge coverage ratio	10,000,000
Fixed charge coverage ratio	15,000,000
Available borrowing capacity	41,200,000
Long term debt, Fair value	59,800,000	59,100,000
Minimum [Member]
Line of Credit Facility [Line Items]
Unused commitment fees	0.30%
FCCR	1.25%
Maximum [Member]
Line of Credit Facility [Line Items]
Unused commitment fees	0.375%
Revolving credit facility [Member]
Line of Credit Facility [Line Items]
Revolving credit borrowing	$ 59,800,000	$ 59,100,000
Amended amortization on real estate component of borrowing base [Member]
Line of Credit Facility [Line Items]
Amortization on real estate component of borrowing base	12 years 6 months