Revenue Recognition - Schedule of Net Under (Over) Billings (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Costs and estimated earnings in excess of billings on uncompleted contracts (contract assets)	$ 27,641	$ 24,334
Billings in excess of costs and estimated earnings on uncompleted contracts (contract liabilities)	(4,931)	(4,718)
Net under billings	$ 22,710	$ 19,616

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