Quarterly Financial Information (Unaudited) (Additional Information) (Detail) (USD $)	3 Months Ended
	Dec. 31, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012
Quarterly Financial Information Disclosure [Line Items]
Impact On Net Income Due To Reversal Of Valuation Allowances	$ 900,000			$ 1,300,000	$ 500,000	$ 1,300,000	$ 800,000
Overstatement Of Consolidated Net Sales				100,000		200,000	300,000
Reduction In Net Sales and Accounts Receivable					500,000
Increase Decrease In Operating Income Nonrecurring			1,800,000
Increase Decrease In Operating Income By Discrete Tax Benefits		300,000	500,000
Computer Software, Intangible Asset [Member]
Quarterly Financial Information Disclosure [Line Items]
impairment of long lived assets to be disposed off				$ 1.8