v2.4.0.8

Summary of Significant Accounting Policies - Finite Lived Intangible Asset Useful Life (Detail)	12 Months Ended
	Dec. 31, 2013
Software [Member]
Finite-Lived Intangible Assets [Line Items]
Finite lived intangible asset useful life	3 years 2 months 12 days
Software [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite lived intangible asset useful life	3 years
Software [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite lived intangible asset useful life	8 years
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Finite lived intangible asset useful life	5 years 7 months 6 days
Patents [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite lived intangible asset useful life	4 years
Patents [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite lived intangible asset useful life	12 years
Trademark/trade name [Member]
Finite-Lived Intangible Assets [Line Items]
Finite lived intangible asset useful life	4 years 3 months 18 days
Trademark/trade name [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite lived intangible asset useful life	5 years
Aircell Axxess technology [Member]
Finite-Lived Intangible Assets [Line Items]
Finite lived intangible asset useful life	1 year 1 month 6 days
Aircell Axxess technology [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite lived intangible asset useful life	8 years
OEM and dealer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite lived intangible asset useful life	3 years 1 month 6 days
OEM and dealer relationships [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite lived intangible asset useful life	10 years
Service customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite lived intangible asset useful life	6 years 3 months 18 days
Service customer relationships [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite lived intangible asset useful life	5 years
Service customer relationships [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite lived intangible asset useful life	7 years

X

- Details

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

X

- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration