Consolidated Businesses - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Aug. 09, 2013 Bolt	Aug. 08, 2014 Msdsonline One	Nov. 03, 2014 Folio Dynamix Subsequent Event
Subsidiary Or Equity Method Investee [Line Items]
Cash paid for acquisition	$ 8.7	$ 10.3	$ 201.0
Addtional earnout paid		$ 2.0