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Revenue Recognition - Schedule of Net Under (Over) Billings (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Contractors [Abstract] |  |
Costs and estimated earnings in excess of billings on uncompleted contracts (contract assets) | $ 22,138 | $ 15,092
Billings in excess of costs and estimated earnings on uncompleted contracts (contract liabilities) | (5,734) | (4,426)
Net under billings | $ 16,404 | $ 10,666

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- Definition Costs And Estimated Earnings In Excess Of Billing On Uncompleted Contracts + References No definition available. + Details
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Namespace Prefix: | ibp_
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- References No definition available. + Details
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