Debt Instrument Fixed Charge Coverage Ratio Covenant

No definition available.

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- Definition

Debt Instrument Leverage Ratio Covenant

+ References

No definition available.

+ Details

Name:	ibp_DebtInstrumentLeverageRatioCovenant
Namespace Prefix:	ibp_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Line Of Credit Facility Additional Interest Rate

+ References

No definition available.

+ Details

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Namespace Prefix:	ibp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of minimum financial levels (for example, tangible net worth and working capital) and achievement of certain financial ratios (for example, working capital ratio and debt service coverage ratio), and adherence to certain clauses which generally require or restrict certain actions (for example, entering into a debt arrangement with equal or greater seniority, and selling or discontinuing a certain business segment or material subsidiary) to be in compliance with the covenant clauses of the debt agreement. May also include a discussion of the adverse consequences that would result if the entity violates or fails to satisfy the covenants.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 470

-Section 50

-Paragraph 3

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of the frequency of periodic payments (monthly, quarterly, annual).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 470

-Section 50

-Paragraph 3

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

+ Details

Name:	us-gaap_DebtInstrumentFrequencyOfPeriodicPayment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityInterestRateDescription
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of the required periodic payment applied to principal.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityPeriodicPaymentPrincipal
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Carrying value as of the balance sheet date of loans payable (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion.

+ References

+ Details

Name:	us-gaap_LongTermLoansPayable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_CreditFacilityAxis=ibp_MasterLoanAgreementMember
Namespace Prefix:
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- Details

Name:	us-gaap_CreditFacilityAxis=ibp_NewCreditAgreementMember
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- Details

Name:	us-gaap_CreditFacilityAxis=ibp_NewLetterOfCreditMember
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- Details

Name:	us-gaap_CreditFacilityAxis=ibp_SwingLinesLoanMember
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- Details

Name:	us-gaap_CreditFacilityAxis=ibp_TermLoanMember
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- Details

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- Details

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- Details

Name:	us-gaap_VariableRateAxis=us-gaap_BaseRateMember
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Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
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Long-term Debt - Additional Information (Detail) (USD $)	12 Months Ended	0 Months Ended
	Dec. 31, 2014	Jul. 08, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Aggregate commitment amount on credit agreement		100,000,000
Term loan	24,688,000us-gaap_LongTermLoansPayable
Outstanding letter of credit	9,815,000
Line of credit outstanding			27,269,000us-gaap_LineOfCredit
Credit facility, interest rate description	The LOC and Term Loan bear interest at either 1) the Eurodollar rate ("LIBOR") or 2) the Base Rate (which approximates Prime Rate), plus a margin based on the type of rate applied and the value (represented as a ratio) of our total debt to earnings.
LIBOR [Member]
Debt Instrument [Line Items]
Line of credit outstanding			24,500,000
Interest rate			2.25%
Base Rate [Member]
Debt Instrument [Line Items]
Line of credit outstanding			2,769,000
Interest rate			4.25%
Scenario, Previously Reported [Member]
Debt Instrument [Line Items]
Aggregate commitment amount on credit agreement		50,000,000
Scenario Forecast [Member] \| Payable from September 30, 2016 Through June 30, 2018 [Member]
Debt Instrument [Line Items]
Credit facility amortization, principal payment	469,000
Scenario Forecast [Member] \| Payable from September 30, 2018 Though June 30, 2019 [Member]
Debt Instrument [Line Items]
Credit facility amortization, principal payment	625,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Aggregate commitment amount on credit agreement		75,000,000
Line of credit outstanding	0
Term Loan [Member]
Debt Instrument [Line Items]
Term loan		25,000,000
Line of credit outstanding	24,688,000
Credit facility, amortization description	The Term Loan amortizes in quarterly principal payments of $313 starting on December 31, 2014, with the quarterly payment amount increasing to $469 from September 30, 2016 through June 30, 2018, and further increasing to $625 from September 30, 2018 through June 30, 2019. Any outstanding principal balance on the Term Loan is due on the Maturity Date.
Term Loan [Member] \| Scenario Forecast [Member] \| Payable Starting on December 31, 2014 [Member]
Debt Instrument [Line Items]
Credit facility amortization, principal payment	313,000
Swing Lines Loan [Member]
Debt Instrument [Line Items]
Aggregate commitment amount on credit agreement		5,000,000
Outstanding letter of credit	0
New Letter of Credit [Member]
Debt Instrument [Line Items]
Aggregate commitment amount on credit agreement		10,000,000
New Credit Agreement [Member]
Debt Instrument [Line Items]
Credit facility, interest rate description	The Credit Agreement also contains various restrictive non-financial covenants and a provision requiring that, upon an event of default (as defined by the Credit Agreement), amounts outstanding under the LOC and Term Loan would bear interest at the rate as determined above plus 2%. In addition, all representations and warranties in the Credit Agreement must be true in all material respects on the date of each borrowing.
Credit facility, covenant terms	The Credit Agreement contains financial covenants requiring us to maintain 1) a leverage ratio of debt to earnings, as adjusted for certain items and as defined by the Credit Agreement, of no greater than 3.50 to 1.00 and decreasing over time to 2.75 to 1.00 by March 31, 2016, and 2) a fixed charge coverage ratio, as adjusted for certain items, of no less than 1.10 to 1.00.
Contingent interest rate increase		2.00%
New Credit Agreement [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Leverage Ratio, covenants requirements		3.50
New Credit Agreement [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Leverage Ratio, covenants requirements		2.75
Fixed coverage ratio, covenants requirements		1.10
Master Loan Agreement [Member]
Debt Instrument [Line Items]
Aggregate commitment amount on credit agreement	5,000,000
Term loan	$ 1,346,000