Summary of Significant Accounting Policies (Details) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended
Feb. 28, 2018 USD ($) $ / shares shares	Mar. 31, 2019 USD ($) hub	Mar. 31, 2018 USD ($) hub
Accounting Policies [Line Items]
Treasury stock (in shares) \| shares	377
Treasury stock (in USD per share) \| $ / shares	$ 11.95
Sale of treasury stock \| $	$ 4,500	$ 0	$ 4,500
Satellite HUBS For HTS Network
Accounting Policies [Line Items]
Capital lease term		5 years	5 years
Number of satellite hubs leased \| hub		3	3

[Line Items] for Accounting Policies [Table]

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- Definition

Number of Satellite Hubs Leased

+ References

No definition available.

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- Definition

Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
-Section 50
-Paragraph 3
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- Definition

The cash inflow from the issuance of an equity stock that has been previously reacquired by the entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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-Paragraph 14
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- Definition

Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

+ References

No definition available.

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Number of treasury shares (units) reissued during the period, excluding reissuance of shares (units) held in treasury used to satisfy equity-based compensation obligations exercised by the holders of such rights. Upon reissuance of shares (units) from treasury, either the common or preferred stock (unit) reissued is outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-SubTopic 10
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