v3.26.1

Variable Interest Entities ("VIEs") - Additional Information (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2026 USD ($) lot	Mar. 31, 2025 USD ($)	Dec. 31, 2025 USD ($)
Variable Interest Entity [Line Items]
Net Contract Land Deposit Impairment Recoveries	$ 8,900	$ 8,100
Loss reserve on contract land deposits	113,459		$ 110,958
Contract land deposits in cash	$ 1,052,440		$ 962,416
Variable Interest Entities
Variable Interest Entity [Line Items]
Maximum range of deposits required under the purchase agreements	10.00%
Lots controlled by NVR \| lot	172,100
Contract land deposits in cash under lot purchase Agreements	$ 1,004,400
Letters of credit related to lots	$ 5,500
Contract on Raw Ground with Landowners
Variable Interest Entity [Line Items]
Lots controlled by NVR \| lot	37,000
Contract land deposits in cash	$ 48,100
Refundable deposits and letters of credit	$ 12,900

The gross amount as of the balance sheet date of deposits paid to secure the right to purchase finished lots.

+ References

No definition available.

+ Details

Name:	nvr_ContractLandDeposits
Namespace Prefix:	nvr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The gross amount as of the balance sheet date of deposits paid to secure the right to purchase finished lots under lot purchase agreements.

+ References

No definition available.

+ Details

Name:	nvr_ContractLandDepositsOnLotPurchaseAgreements
Namespace Prefix:	nvr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Letter of credit on lot purchase agreements.

+ References

No definition available.

+ Details

Name:	nvr_LetterOfCreditOnLotPurchaseAgreements
Namespace Prefix:	nvr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The reserve account established to account for expected but unspecified losses related to contract land deposits.

+ References

No definition available.

+ Details

Name:	nvr_LossReserveOnContractLandDeposits
Namespace Prefix:	nvr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Lots controlled by NVR.

+ References

No definition available.

+ Details

Name:	nvr_LotsControlledByCompany
Namespace Prefix:	nvr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Maximum percentage of deposits required under the purchase agreements.

+ References

No definition available.

+ Details

Name:	nvr_MaximumPercentageOfDepositsRequiredUnderPurchaseAgreements
Namespace Prefix:	nvr_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Net Contract Land Deposit Impairment Recoveries

+ References

No definition available.

+ Details

Name:	nvr_NetContractLandDepositImpairmentRecoveries
Namespace Prefix:	nvr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Portion of deposits and letters of credit made on raw land contracts which may be refundable.

+ References

No definition available.

+ Details

Name:	nvr_RefundableDeposits
Namespace Prefix:	nvr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 810
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481203/810-10-50-3

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 810
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 25
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481231/810-10-45-25

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 810
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (bb)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481203/810-10-50-3

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 810
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 25
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481231/810-10-45-25

+ Details

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

- Details

Name:	us-gaap_OtherCommitmentsAxis=us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_OtherCommitmentsAxis=nvr_RawGroundContractsVariableInterestEntityNotPrimaryBeneficiaryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

NVR INC 10-Q