Reflects the sum of all other revenue and income realized from sales and other transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party during the period.

No definition available.

Name:	us-gaap_RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Related Party Transactions and Balances - Summary of Related Party Transactions (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Lease Agreements [Member]
Related Party Transaction [Line Items]
Purchase for lease agreements	$ 2,200
Advertising [Member]
Related Party Transaction [Line Items]
Revenue from provision of advertising services		32	45
Expenses for leases of advertising space	$ 166