Schedule of Disposal Groups Including Discontinued BalanceSheet (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Current assets		$ 229,605,000
Current liabilities		63,917,000
Investor Force
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Current assets		3,100,000
Noncurrent assets		1,000,000
Assets of discontinued operations		4,100,000
Current liabilities		3,600,000
Noncurrent liabilities		300,000
Liabilities of discontinued operations		3,900,000
Channel Intelligence
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Current assets		6,200,000
Noncurrent assets		72,200,000
Assets of discontinued operations		78,400,000
Current liabilities		6,300,000
Noncurrent liabilities		200,000
Liabilities of discontinued operations		6,500,000
Procurian
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Current assets		72,800,000
Noncurrent assets		74,300,000
Assets of discontinued operations		147,100,000
Current liabilities		30,600,000
Noncurrent liabilities		22,900,000
Liabilities of discontinued operations		$ 53,500,000