Debt Instrument Basis Spread Reduction On Variable Rate

No definition available.

Name:	gsat_DebtInstrumentBasisSpreadReductionOnVariableRate
Namespace Prefix:	gsat_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument Interest Base Rate

+ References

No definition available.

+ Details

Name:	gsat_DebtInstrumentInterestBaseRate
Namespace Prefix:	gsat_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Fee for interest rate cap agreements.

+ References

No definition available.

+ Details

Name:	gsat_FeeForInterestRateCapAgreements
Namespace Prefix:	gsat_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Cap rate on an interest rate derivative such as an interest rate cap or collar. If market rates exceed the cap rate, a payment or receipt is triggered on the contract.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeCapInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Definition

Period remaining until the derivative contract matures, 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_DerivativeRemainingMaturity1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of interest rate derivative instruments held by the entity at the reporting date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5579245-113959

+ Details

Name:	us-gaap_NumberOfInterestRateDerivativesHeld
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_DebtInstrumentAxis=gsat_ConvertibleEightPointZeroPercentSeniorNotesIssuedTwentyThirteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateCapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=gsat_SixMonthLondonInterbankOfferedRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Derivatives - Narrative (Details) $ in Millions	1 Months Ended
Derivatives - Narrative (Details) $ in Millions	Jun. 30, 2009 USD ($) contract	Jun. 30, 2017	Dec. 31, 2013
8.00% Convertible Senior Notes Issued in 2013
Derivative [Line Items]
Loan interest rate		8.00%	8.00%
Interest rate cap
Derivative [Line Items]
Number of Interest rate cap agreements (in contracts) \| contract	5
Maturity period	10 years
Interest rate cap \| Six-month LIBOR Rate
Derivative [Line Items]
Base rate to be capped, should the Base Rate not exceed 6.50%	5.50%
Interest on outstanding amounts on the Facility Agreement	6.50%
Base rate to be lowered from LIBOR, should the base rate exceed 6.50%	1.00%
Fee for interest rate cap agreements \| $	$ 12.4