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

No definition available.

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

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 Charges (Recoveries)

+ References

No definition available.

+ Details

Name:	nvr_NetContractLandDepositImpairmentChargesRecoveries
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

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 860
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Subparagraph (b)(1)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481420/860-30-50-1A

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 860
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Subparagraph (b)(1)(ii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481420/860-30-50-1A

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 860
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481420/860-30-50-1A

+ 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:

Variable Interest Entities ("VIE's") - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2025 USD ($) lot	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Variable Interest Entity [Line Items]
Maximum range of deposits required under the purchase agreements	10.00%
Net Contract Land Deposit Impairment Charges (Recoveries)	$ 75,900	$ 7,200	$ (2,900)
Contract Land Deposits	$ 962,416	$ 785,272
Variable Interest Entities
Variable Interest Entity [Line Items]
Maximum range of deposits required under the purchase agreements	10.00%
Lots controlled by NVR \| lot	169,250
Contract land deposits in cash under Lot Purchase Agreements	$ 920,100
Letters of credit related to lots	$ 4,600
Contract on Raw Ground with Landowners
Variable Interest Entity [Line Items]
Lots controlled by NVR \| lot	38,200
Refundable deposits	$ 9,000
Contract Land Deposits	$ 42,300