v2.4.0.8

Subsequent Events - Additional Information (Detail) (Subsequent event, USD $) In Millions, unless otherwise specified | Jun. 04, 2014
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Subsequent event |
Definitive agreement to divest PowerReviews, expected cash proceed | $ 30.0
Amount that will be placed into escrow as partial security for the Company's indemnification obligations | $ 4.5

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- Definition Expected Proceeds from Divestiture Of Business + References No definition available. + Details
Name: | bv_ExpectedProceedsFromDivestitureOfBusiness
Namespace Prefix: | bv_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The designation of funds furnished by a borrower to a lender to assure future payments of the borrower's real estate taxes and insurance obligations with respect to a mortgaged property. Escrow deposits may be made for a variety of other purposes such as earnest money and contingent payments. This element excludes replacement reserves which are an escrow separately provided for within the US GAAP taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_EscrowDeposit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant