Revenue Recognition - Schedule of Net Under (Over) Billings (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Revenue from Contract with Customer [Abstract]
Costs and estimated earnings in excess of billings on uncompleted contracts (contract assets)	$ 37.2	$ 33.2
Billings in excess of costs and estimated earnings on uncompleted contracts (contract liabilities)	(9.0)	(9.2)
Net under billings	$ 28.2	$ 24.0

Costs And Estimated Earnings In Excess Of Billing On Uncompleted Contracts

No definition available.

Name:	ibp_CostsAndEstimatedEarningsInExcessOfBillingOnUncompletedContracts
Namespace Prefix:	ibp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant