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Goodwill and Other Intangible Assets - Intangible Assets Not Subject to Amortization (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2013 | Dec. 31, 2012
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Schedule Of Goodwill And Other Intangible Assets [Line Items] |  |
Goodwill |  | $ 60,744
Nonamortizable Goodwill [Member] |  |
Schedule Of Goodwill And Other Intangible Assets [Line Items] |  |
Non reflected portion of goodwill | 7,100 | 3,400
Primus Telecommunications Inc [Member] |  |
Schedule Of Goodwill And Other Intangible Assets [Line Items] |  |
Goodwill | 3,700 |
International Carrier Services [Member] |  |
Schedule Of Goodwill And Other Intangible Assets [Line Items] |  |
Non reflected portion of goodwill | 20,292 | 19,313
Goodwill | $ 3,400 | $ 3,400

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- 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
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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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