Statement [Line Items]

No definition available.

Name:	hbm_StatementLineItems
Namespace Prefix:	hbm_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount that cash and cash equivalents constitute of the fair value of defined benefit plan assets. [Refer: Cash and cash equivalents; Plan assets, at fair value; Defined benefit plans [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 19
-IssueDate 2017-01-01
-Paragraph 142
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_142_a&doctype=Standard
-URIDate 2017-03-09

+ Details

Name:	ifrs-full_CashAndCashEquivalentsAmountContributedToFairValueOfPlanAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount that investment funds constitute of the fair value of defined benefit plan assets. [Refer: Plan assets, at fair value; Defined benefit plans [member]; Investment funds [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 19
-IssueDate 2017-01-01
-Paragraph 142
-Subparagraph f
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_142_f&doctype=Standard
-URIDate 2017-03-09

+ Details

Name:	ifrs-full_InvestmentFundsAmountContributedToFairValueOfPlanAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The fair value of defined benefit plan assets. Plan assets comprise assets held by a long-term employee benefit fund and qualifying insurance policies. [Refer: At fair value [member]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 19
-IssueDate 2017-01-01
-Paragraph 57
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_57_a&doctype=Standard
-URIDate 2017-03-09

+ Details

Name:	ifrs-full_PlanAssetsAtFairValue
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	hbm_EmployeeBenefitsAxis=hbm_PensionObligationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_LevelsOfFairValueHierarchyAxis=ifrs-full_Level1OfFairValueHierarchyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_LevelsOfFairValueHierarchyAxis=ifrs-full_Level2OfFairValueHierarchyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_LevelsOfFairValueHierarchyAxis=ifrs-full_Level3OfFairValueHierarchyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfInvestmentPropertyAxis=hbm_MoneyMarketInstrumentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfInvestmentPropertyAxis=hbm_PooledEquityFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfInvestmentPropertyAxis=hbm_PooledFixedIncomeFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfInvestmentPropertyAxis=ifrs-full_InvestmentFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfInvestmentPropertyAxis=hbm_BalancedFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Disclosure of fair value of plan assets (Details) - Pension obligations [Member] - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement [Line Items]
Plan assets, at fair value	$ 341,432	$ 296,151	$ 279,523
Level 1 [Member]
Statement [Line Items]
Plan assets, at fair value	120,652	125,618
Level 2 [Member]
Statement [Line Items]
Plan assets, at fair value	220,780	170,533
Level 3 [Member]
Statement [Line Items]
Plan assets, at fair value	0	0
Money market instruments [Member]
Statement [Line Items]
Cash and cash equivalents, amount contributed to fair value of plan assets	4,625	4,515
Money market instruments [Member] \| Level 1 [Member]
Statement [Line Items]
Cash and cash equivalents, amount contributed to fair value of plan assets	4,625	4,515
Money market instruments [Member] \| Level 2 [Member]
Statement [Line Items]
Cash and cash equivalents, amount contributed to fair value of plan assets	0	0
Money market instruments [Member] \| Level 3 [Member]
Statement [Line Items]
Cash and cash equivalents, amount contributed to fair value of plan assets	0	0
Pooled equity funds [Member]
Statement [Line Items]
Investment funds, amount contributed to fair value of plan assets	116,027	121,103
Pooled equity funds [Member] \| Level 1 [Member]
Statement [Line Items]
Investment funds, amount contributed to fair value of plan assets	116,027	121,103
Pooled equity funds [Member] \| Level 2 [Member]
Statement [Line Items]
Investment funds, amount contributed to fair value of plan assets	0	0
Pooled equity funds [Member] \| Level 3 [Member]
Statement [Line Items]
Investment funds, amount contributed to fair value of plan assets	0	0
Pooled fixed income funds [Member]
Statement [Line Items]
Investment funds, amount contributed to fair value of plan assets	189,964	143,489
Pooled fixed income funds [Member] \| Level 1 [Member]
Statement [Line Items]
Investment funds, amount contributed to fair value of plan assets	0	0
Pooled fixed income funds [Member] \| Level 2 [Member]
Statement [Line Items]
Investment funds, amount contributed to fair value of plan assets	189,964	143,489
Pooled fixed income funds [Member] \| Level 3 [Member]
Statement [Line Items]
Investment funds, amount contributed to fair value of plan assets	0	0
Alternative investment funds [Member]
Statement [Line Items]
Investment funds, amount contributed to fair value of plan assets	30,699	26,404
Alternative investment funds [Member] \| Level 1 [Member]
Statement [Line Items]
Investment funds, amount contributed to fair value of plan assets	0	0
Alternative investment funds [Member] \| Level 2 [Member]
Statement [Line Items]
Investment funds, amount contributed to fair value of plan assets	30,699	26,404
Alternative investment funds [Member] \| Level 3 [Member]
Statement [Line Items]
Investment funds, amount contributed to fair value of plan assets	0	0
Balanced funds [Member]
Statement [Line Items]
Investment funds, amount contributed to fair value of plan assets	117	640
Balanced funds [Member] \| Level 1 [Member]
Statement [Line Items]
Investment funds, amount contributed to fair value of plan assets	0	0
Balanced funds [Member] \| Level 2 [Member]
Statement [Line Items]
Investment funds, amount contributed to fair value of plan assets	117	640
Balanced funds [Member] \| Level 3 [Member]
Statement [Line Items]
Investment funds, amount contributed to fair value of plan assets	$ 0	$ 0