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Subsequent Event - Narrative (Details) - Subsequent Event $ in Millions	Aug. 08, 2017 USD ($) property period
Subsequent Event [Line Items]
Sale leaseback transaction, number of properties | property	44
Sale leaseback transaction, gross proceeds | $	$ 123.5
Sale leaseback transaction, lease term (in years)	20 years
Sale leaseback transaction, number of additional periods | period	5
Sale lleaseback transaction, length of each additional period (in years)	5 years

X

- Definition

Sale Leaseback Transaction, Lease Term, Period

+ References

No definition available.

+ Details

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Namespace Prefix:	hri_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Sale Leaseback Transaction, Length Of Each Additional Period

+ References

No definition available.

+ Details

Name:	hri_SaleLeasebackTransactionLengthOfEachAdditionalPeriod
Namespace Prefix:	hri_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Sale Leaseback Transaction, Number of Properties

+ References

No definition available.

+ Details

Name:	hri_SaleLeasebackTransactionNumberofProperties
Namespace Prefix:	hri_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Sale Leaseback Transaction, Renewal Term, Number of Additional Terms

+ References

No definition available.

+ Details

Name:	hri_SaleLeasebackTransactionRenewalTermNumberofAdditionalTerms
Namespace Prefix:	hri_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of cash inflow before closing and debt issuance costs received by a seller-lessee in a sale-leaseback recognized in financing activities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 40
-Section 55
-Paragraph 50
-URI http://asc.fasb.org/extlink&oid=28365400&loc=d3e51831-112757

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 40
-Section 55
-Paragraph 51
-URI http://asc.fasb.org/extlink&oid=28365400&loc=d3e51840-112757

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 40
-Section 55
-Paragraph 52
-URI http://asc.fasb.org/extlink&oid=28365400&loc=d3e51843-112757

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: