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Property and Equipment - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Property, Plant and Equipment [Abstract] |  |
Property and equipment fully depreciated | $ 49.7 | $ 42.7

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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