Revenue Recognition - Schedule of Net Under (Over) Billings (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Revenue from Contract with Customer [Abstract]
Costs and estimated earnings in excess of billings on uncompleted contracts (contract assets)	$ 38.1	$ 31.7
Billings in excess of costs and estimated earnings on uncompleted contracts (contract liabilities)	(10.8)	(10.1)
Net under billings	$ 27.3	$ 21.6

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