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Commitments and Contingencies - Additional Information (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2019 USD ($)
Commitments And Contingencies Disclosure [Line Items]
Purchase obligation, 2019	$ 16.4
Purchase obligation, 2020	21.4
Purchase obligation, 2021	15.0
Purchase Obligations Satisfied	4.5
Actual Purchases Under Agreement	0.3
Chemical Supplier [Member]
Commitments And Contingencies Disclosure [Line Items]
Purchase obligation, 2019	$ 0.6

X

- Definition

Represents actual purchases.

+ References

No definition available.

+ Details

Name:	ibp_ActualPurchasesUnderAgreement
Namespace Prefix:	ibp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Commitments and contingencies disclosure.

+ References

No definition available.

+ Details

Name:	ibp_CommitmentsAndContingenciesDisclosureLineItems
Namespace Prefix:	ibp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents purchase obligations satisfied.

+ References

No definition available.

+ Details

Name:	ibp_PurchaseObligationsSatisfied
Namespace Prefix:	ibp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Minimum amount of purchase arrangement maturing in the next fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments.

+ References

No definition available.

+ Details

Name:	us-gaap_PurchaseObligationDueInNextTwelveMonths
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Minimum amount of purchase arrangement maturing in the second fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments.

+ References

No definition available.

+ Details

Name:	us-gaap_PurchaseObligationDueInSecondYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Minimum amount of purchase arrangement maturing in the third fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments.

+ References

No definition available.

+ Details

Name:	us-gaap_PurchaseObligationDueInThirdYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_TypeOfArrangementAxis=ibp_ChemicalSupplierMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: