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Related Party Transactions - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012
Related Party Transaction [Line Items] |  |
Rent and other expenses paid | $ 0.1 | $ 0.1
Consulting Services [Member] | Related Party One [Member] |  |
Related Party Transaction [Line Items] |  |
Rent and other expenses paid | 0.4 | 0.4
Consulting Services [Member] | Related Party Two [Member] |  |
Related Party Transaction [Line Items] |  |
Rent and other expenses paid | $ 0.3 | $ 0.1

X
- Details
Name: | us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of selling, general and administrative expenses resulting from transactions, excluding transactions that are eliminated in consolidated or combined financial statements, with related party. + References No definition available. + Details
Name: | us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration