Stock Buyback Program (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Jun. 30, 2009
Stock Buyback Program [Abstract]
Stock repurchase program, number of shares authorized to be repurchased		1,500,000
Stock repurchased and retired during period, shares	320,911
Stock repurchased and retired during period, value	$ 7.7
Weighted average price of shares repurchased and retired	$ 23.99
Total stock repurchase, shares	3,589,425hlx_TotalStockRepurchaseShares
Total stock repurchase, value	$ 53.5hlx_TotalStockRepurchaseValue
Repurchase of common stock, value per share	$ 14.90
Stock repurchase program, remaining number of shares authorized to be repurchased	55,674

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Stock repurchased and retired during period average cost per share

+ References

No definition available.

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- Definition

Total stock repurchase shares

+ References

No definition available.

+ Details

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- Definition

Total stock repurchase value

+ References

No definition available.

+ Details

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- Definition

The weighted average of per share prices paid for shares repurchased on the open market and retired und the stock repurchase program.

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No definition available.

+ Details

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- Definition

Number of shares that have been repurchased and retired during the period.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

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- Definition

Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

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- Definition

The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

+ References

No definition available.

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- Definition

The remaining number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

+ References

No definition available.

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