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Goodwill and Other Intangible Assets - Intangible Assets Subject to Amortization (Parenthetical) (Detail) (Primus Telecommunications Inc [Member], Customer Relationships [Member], USD $) In Thousands, unless otherwise specified	Sep. 30, 2013
Primus Telecommunications Inc [Member] | Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Non reflected portion of net book values of customer relationships	$ 400

X

- Definition

Long-lived assets that are held for sale apart from normal operations and anticipated to be sold in less than one year.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section 45

-Paragraph 10

-URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e1107-107759

+ Details

Name:	us-gaap_AssetsHeldForSaleLongLived
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration