Accounting Policies and Basis of Presentation (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	0 Months Ended				3 Months Ended			9 Months Ended
	Apr. 10, 2013	Feb. 28, 2013	Apr. 19, 2012	Mar. 01, 2012	Sep. 30, 2013	Mar. 31, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Accounting Policies [Abstract]
Shipping and handling revenue					$ 3,153		$ 2,537	$ 8,789	$ 7,656
Effective income tax rate, continuing operations (percent)					(0.30%)		19.30%	(0.20%)	9.50%
Discontinued operation, tax effect of discontinued operation						47		47
Debt instrument, fair value disclosure					30,585			30,585		32,596
Long-term debt, gross					30,430			30,430		32,744
Common stock, dividends, per share, declared (in Dollars per share)		$ 0.05		$ 0.05
Payments of dividends	916		914					916	914
Revolving credit facility					24,867			24,867		25,893
Credit facility, remaining borrowing capacity					19,463			19,463
Letter of credit outstanding					$ 2,000			$ 2,000