Weighted Average Common Shares Outstanding Included in Computation of Basic and Diluted Net (Loss) per Share (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share [Abstract]
Weighted average common shares outstanding-Basic	21,951,000	21,835,000	21,891,000	21,826,000
Dilutive effect of common shares issuable upon exercise of stock options, RSUs and SARs
Weighted average common shares outstanding assuming dilution	21,951,000	21,835,000	21,891,000	21,826,000