Differences in Effective Tax Rate and Federal Statutory Rate (Detail)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Taxes [Line Items]
Tax expense (benefit) at statutory rate	(35.00%)	35.00%	35.00%
IRS audit adjustment and interest			(0.90%)
Foreign and state taxes	(2.30%)	4.60%	2.10%
Non-deductible expenses and other	0.60%	0.10%	3.70%
Valuation allowance		(24.40%)	(57.80%)
Prior period adjustment		(3.60%)
Acquisition of MSDSonline		(6.30%)
Effective Income Tax Rate, Continuing Operations, Total	(36.70%)	5.40%	(17.90%)