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Property and Equipment - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Abstract]
Property and equipment fully depreciated	$ 98.0	$ 72.7

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- Definition

Property And Equipment Fully Depreciated Assets

+ References

No definition available.

+ Details

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

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- References

No definition available.

+ Details

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