Acquisitions - Carrying amounts and classifications of assets and liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013
Current liabilities [Member]
Liabilities	$ 1,038
Long-term liabilities [Member]
Liabilities	53
Current assets [Member]
Assets	1,717
Long-term assets [Member]
Assets	$ 6,347

The carrying amount of the consolidated Variable Interest Entity's liabilities included in the reporting entity's statement of financial position.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (bb)

-URI http://asc.fasb.org/extlink&oid=28200181&loc=d3e5710-111685

Name:	us-gaap_VariableInterestEntityConsolidatedCarryingAmountLiabilities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant