$NRP
NATURAL RESOURCE PARTNERS LP Stock $nrp

$nrp Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-Q Financial Statement

#000117148620000044 Filed on November 05, 2020

Income Statement

Concept	2020 Q4	2020 Q3	2019 Q3
Revenue	$39.05M	$29.93M	$57.60M
YoY Change	-24.66%	-48.04%	-1.04%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin	$8.720M	$9.415M	$10.25M
YoY Change	-11.53%	-8.12%	2.75%
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$3.013M	$2.111M	$3.384M
YoY Change	-5.43%	-37.62%	-30.77%
% of Gross Profit
Operating Expenses	$11.73M	$12.46M	$14.12M
YoY Change	-10.04%	-11.73%	-5.02%
Operating Profit		$17.47M	$49.59M
YoY Change		-64.77%	14.41%
Interest Expense	-$10.08M	$10.25M	$10.43M
YoY Change	-3.03%	-1.7%	-40.37%
% of Operating Profit		58.69%	21.03%
Other Income/Expense, Net		$10.25M	$10.43M
YoY Change		-1.7%	-40.37%
Pretax Income	$14.69M	$7.216M	$39.16M
YoY Change	-112.3%	-81.57%	51.48%
Income Tax
% Of Pretax Income
Net Earnings	$14.69M	$7.216M	$39.17M
YoY Change	-112.37%	-81.58%	35.54%
Net Earnings / Revenue	37.61%	24.11%	68.0%
Basic Earnings Per Share
Diluted Earnings Per Share	$1.198M	$588.5K	$1.691M
COMMON SHARES
Basic Shares Outstanding	12.26M shares	12.26M shares	12.26M shares
Diluted Shares Outstanding

Balance Sheet

Concept	2020 Q4	2020 Q3	2019 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$99.79M	$115.6M	$99.64M
YoY Change	1.55%	16.0%	57.19%
Cash & Equivalents	$99.79M	$115.6M	$99.64M
Short-Term Investments
Other Short-Term Assets	$5.080M	$3.972M	$16.63M
YoY Change	72.2%	-76.11%	194.11%
Inventory
Prepaid Expenses
Receivables	$12.32M	$17.46M	$27.45M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$117.2M	$137.0M	$143.7M
YoY Change	-11.27%	-4.66%	6.95%
LONG-TERM ASSETS
Property, Plant & Equipment	$484.4M	$489.9M	$762.0K
YoY Change	-23.0%	64188.45%	-98.42%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$262.5M	$256.8M	$258.1M
YoY Change	-0.22%	-0.48%	6.24%
Other Assets	$7.067M	$7.447M	$6.274M
YoY Change	1.12%	18.7%	1.39%
Total Long-Term Assets	$804.7M	$805.6M	$1.100B
YoY Change	-15.64%	-26.78%	-13.88%
TOTAL ASSETS
Total Short-Term Assets	$117.2M	$137.0M	$143.7M
Total Long-Term Assets	$804.7M	$805.6M	$1.100B
Total Assets	$921.9M	$942.6M	$1.244B
YoY Change	-15.11%	-24.23%	-11.9%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$1.385M	$1.372M	$1.591M
YoY Change	17.47%	-13.76%	-78.69%
Accrued Expenses	$7.733M	$6.859M	$7.290M
YoY Change	-11.76%	-5.91%	-47.95%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$39.06M	$39.07M	$45.79M
YoY Change	-14.68%	-14.67%	-39.11%
Total Short-Term Liabilities	$61.37M	$67.61M	$74.26M
YoY Change	-2.13%	-8.95%	-28.75%
LONG-TERM LIABILITIES
Long-Term Debt	$432.4M	$452.4M	$490.4M
YoY Change	-8.07%	-7.74%	-31.56%
Other Long-Term Liabilities	$5.131M	$5.020M	$4.843M
YoY Change	3.68%	3.65%	147.34%
Total Long-Term Liabilities	$437.6M	$457.4M	$495.2M
YoY Change	-7.95%	-7.63%	-31.07%
TOTAL LIABILITIES
Total Short-Term Liabilities	$61.37M	$67.61M	$74.26M
Total Long-Term Liabilities	$437.6M	$457.4M	$495.2M
Total Liabilities	$549.0M	$576.0M	$613.1M
YoY Change	-6.2%	-6.04%	-29.01%
SHAREHOLDERS EQUITY
Retained Earnings
YoY Change
Common Stock
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$372.9M	$366.5M	$633.8M
YoY Change
Total Liabilities & Shareholders Equity	$921.9M	$942.6M	$1.244B
YoY Change	-15.11%	-24.23%	-11.9%

Cashflow Statement

Concept	2020 Q4	2020 Q3	2019 Q3
OPERATING ACTIVITIES
Net Income	$14.69M	$7.216M	$39.17M
YoY Change	-112.37%	-81.58%	35.54%
Depreciation, Depletion And Amortization	$3.013M	$2.111M	$3.384M
YoY Change	-5.43%	-37.62%	-30.77%
Cash From Operating Activities	$13.16M	$24.32M	$41.38M
YoY Change	-32.16%	-41.21%	23.7%
INVESTING ACTIVITIES
Capital Expenditures	$0.00
YoY Change	-100.0%
Acquisitions
YoY Change
Other Investing Activities	$777.0K	$332.0K	$6.445M
YoY Change	273.56%	-94.85%	-420.01%
Cash From Investing Activities	$777.0K	$332.0K	$6.445M
YoY Change	317.74%	-94.85%	-420.01%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-29.72M	-19.91M	-21.43M
YoY Change	-11.23%	-7.1%	2.18%
NET CHANGE
Cash From Operating Activities	13.16M	24.32M	41.38M
Cash From Investing Activities	777.0K	332.0K	6.445M
Cash From Financing Activities	-29.72M	-19.91M	-21.43M
Net Change In Cash	-15.78M	4.745M	26.39M
YoY Change	13.56%	-82.02%	152.28%
FREE CASH FLOW
Cash From Operating Activities	$13.16M	$24.32M	$41.38M
Capital Expenditures	$0.00
Free Cash Flow	$13.16M
YoY Change	-32.23%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Amendment Flag AmendmentFlag	false
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Entity Central Index Key EntityCentralIndexKey	0001171486
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	12261199	shares
	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2020-09-30
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	001-31465
	dei	Entity Registrant Name EntityRegistrantName	NATURAL RESOURCE PARTNERS LP
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	35-2164875
	dei	Entity Address Address Line1 EntityAddressAddressLine1	1201 Louisiana Street, Suite 3400
	dei	Entity Address City Or Town EntityAddressCityOrTown	Houston
CY2019Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	1244000	USD
	dei	Security Exchange Name SecurityExchangeName	NYSE
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Address State Or Province EntityAddressStateOrProvince	TX
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	77002
	dei	City Area Code CityAreaCode	713
	dei	Local Phone Number LocalPhoneNumber	751-7507
	dei	Security12b Title Security12bTitle	Common Units representing limited partner interests
	dei	Trading Symbol TradingSymbol	NRP
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
	dei	Entity Small Business EntitySmallBusiness	false
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Shell Company EntityShellCompany	false
CY2020Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	115573000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	98265000	USD
CY2020Q3	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	17462000	USD
CY2019Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	30869000	USD
CY2020Q3	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	3972000	USD
CY2020Q3	us-gaap	Assets Of Disposal Group Including Discontinued Operation Current AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent	0	USD
CY2019Q4	us-gaap	Assets Of Disposal Group Including Discontinued Operation Current AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent	1706000	USD
CY2020Q3	us-gaap	Assets Current AssetsCurrent	137007000	USD
CY2019Q4	us-gaap	Assets Current AssetsCurrent	132084000	USD
CY2020Q3	us-gaap	Land Land	24008000	USD
CY2019Q4	us-gaap	Land Land	24008000	USD
CY2020Q3	us-gaap	Mineral Properties Net MineralPropertiesNet	465870000	USD
CY2019Q4	us-gaap	Mineral Properties Net MineralPropertiesNet	605096000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	17601000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	17687000	USD
CY2020Q3	us-gaap	Equity Method Investments EquityMethodInvestments	256834000	USD
CY2019Q4	us-gaap	Equity Method Investments EquityMethodInvestments	263080000	USD
CY2020Q3	us-gaap	Nontrade Receivables Noncurrent NontradeReceivablesNoncurrent	33791000	USD
CY2019Q4	us-gaap	Nontrade Receivables Noncurrent NontradeReceivablesNoncurrent	36963000	USD
CY2020Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	7447000	USD
CY2019Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	6989000	USD
CY2020Q3	us-gaap	Assets Assets	942558000	USD
CY2019Q4	us-gaap	Assets Assets	1085907000	USD
CY2020Q3	us-gaap	Accounts Payable Current AccountsPayableCurrent	1372000	USD
CY2019Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	1179000	USD
CY2020Q3	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	6859000	USD
CY2019Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	8764000	USD
CY2020Q3	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	9273000	USD
CY2019Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	2316000	USD
CY2020Q3	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	11035000	USD
CY2019Q4	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	4608000	USD
CY2020Q3	us-gaap	Long Term Debt Current LongTermDebtCurrent	39072000	USD
CY2019Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	45776000	USD
CY2020Q3	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation Current LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent	0	USD
CY2019Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation Current LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent	65000	USD
CY2020Q3	us-gaap	Liabilities Current LiabilitiesCurrent	67611000	USD
CY2019Q4	us-gaap	Liabilities Current LiabilitiesCurrent	62708000	USD
CY2020Q3	us-gaap	Deferred Revenue Noncurrent DeferredRevenueNoncurrent	50980000	USD
CY2019Q4	us-gaap	Deferred Revenue Noncurrent DeferredRevenueNoncurrent	47213000	USD
CY2020Q3	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	452401000	USD
CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	470422000	USD
CY2020Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	5020000	USD
CY2019Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	4949000	USD
CY2020Q3	us-gaap	Liabilities Liabilities	576012000	USD
CY2019Q4	us-gaap	Liabilities Liabilities	585292000	USD
CY2020Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2019Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2019Q4	us-gaap	Preferred Units Outstanding PreferredUnitsOutstanding	250000	shares
CY2020Q3	us-gaap	Preferred Units Outstanding PreferredUnitsOutstanding	250000	shares
CY2020Q3	us-gaap	Preferred Units Issued PreferredUnitsIssued	250000	shares
CY2019Q4	us-gaap	Preferred Units Issued PreferredUnitsIssued	250000	shares
CY2020Q3	us-gaap	Temporary Equity Par Or Stated Value Per Share TemporaryEquityParOrStatedValuePerShare	1000
CY2019Q4	us-gaap	Temporary Equity Par Or Stated Value Per Share TemporaryEquityParOrStatedValuePerShare	1000
CY2020Q3	us-gaap	Temporary Equity Liquidation Preference Per Share TemporaryEquityLiquidationPreferencePerShare	1700
CY2019Q4	us-gaap	Temporary Equity Liquidation Preference Per Share TemporaryEquityLiquidationPreferencePerShare	1500
CY2020Q3	us-gaap	Temporary Equity Carrying Amount Including Portion Attributable To Noncontrolling Interests TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests	164587000	USD
CY2019Q4	us-gaap	Temporary Equity Carrying Amount Including Portion Attributable To Noncontrolling Interests TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests	164587000	USD
CY2020Q3	us-gaap	Limited Partners Capital Account Units Outstanding LimitedPartnersCapitalAccountUnitsOutstanding	12261199	shares
CY2019Q4	us-gaap	Limited Partners Capital Account Units Issued LimitedPartnersCapitalAccountUnitsIssued	12261199	shares
CY2020Q3	us-gaap	Limited Partners Capital Account Units Issued LimitedPartnersCapitalAccountUnitsIssued	12261199	shares
CY2019Q4	us-gaap	Limited Partners Capital Account Units Outstanding LimitedPartnersCapitalAccountUnitsOutstanding	12261199	shares
CY2020Q3	us-gaap	Limited Partners Capital Account LimitedPartnersCapitalAccount	134545000	USD
CY2019Q4	us-gaap	Limited Partners Capital Account LimitedPartnersCapitalAccount	271471000	USD
CY2020Q3	us-gaap	General Partners Capital Account GeneralPartnersCapitalAccount	428000	USD
CY2019Q4	us-gaap	General Partners Capital Account GeneralPartnersCapitalAccount	3270000	USD
CY2020Q3	us-gaap	Warrants And Rights Outstanding WarrantsAndRightsOutstanding	66816000	USD
CY2019Q4	us-gaap	Warrants And Rights Outstanding WarrantsAndRightsOutstanding	66816000	USD
CY2020Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	170000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-2594000	USD
CY2020Q3	us-gaap	Partners Capital PartnersCapital	201959000	USD
CY2019Q4	us-gaap	Partners Capital PartnersCapital	338963000	USD
CY2020Q3	us-gaap	Partners Capital Attributable To Noncontrolling Interest PartnersCapitalAttributableToNoncontrollingInterest	0	USD
CY2019Q4	us-gaap	Partners Capital Attributable To Noncontrolling Interest PartnersCapitalAttributableToNoncontrollingInterest	-2935000	USD
CY2020Q3	us-gaap	Partners Capital Including Portion Attributable To Noncontrolling Interest PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest	201959000	USD
CY2019Q4	us-gaap	Partners Capital Including Portion Attributable To Noncontrolling Interest PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest	336028000	USD
CY2020Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	942558000	USD
CY2019Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1085907000	USD
CY2020Q3	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	0	USD
CY2019Q3	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	6107000	USD
	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	465000	USD
	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	6609000	USD
CY2020Q3	nrp	Revenue Net Including Gain Losson Dispositionof Assets RevenueNetIncludingGainLossonDispositionofAssets	29930000	USD
CY2019Q3	nrp	Revenue Net Including Gain Losson Dispositionof Assets RevenueNetIncludingGainLossonDispositionofAssets	63709000	USD
	nrp	Revenue Net Including Gain Losson Dispositionof Assets RevenueNetIncludingGainLossonDispositionofAssets	101155000	USD
	nrp	Revenue Net Including Gain Losson Dispositionof Assets RevenueNetIncludingGainLossonDispositionofAssets	212219000	USD
CY2020Q3	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	5781000	USD
CY2019Q3	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	5994000	USD
	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	19200000	USD
	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	26813000	USD
CY2020Q3	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	2111000	USD
CY2019Q3	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	3384000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	6185000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	11746000	USD
CY2020Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	3634000	USD
CY2019Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	4253000	USD
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	11168000	USD
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	12799000	USD
CY2020Q3	us-gaap	Asset Impairment Charges AssetImpairmentCharges	934000	USD
CY2019Q3	us-gaap	Asset Impairment Charges AssetImpairmentCharges	484000	USD
	us-gaap	Asset Impairment Charges AssetImpairmentCharges	133217000	USD
	us-gaap	Asset Impairment Charges AssetImpairmentCharges	484000	USD
CY2020Q3	us-gaap	Operating Expenses OperatingExpenses	12460000	USD
CY2019Q3	us-gaap	Operating Expenses OperatingExpenses	14115000	USD
	us-gaap	Operating Expenses OperatingExpenses	169770000	USD
	us-gaap	Operating Expenses OperatingExpenses	51842000	USD
CY2020Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	17470000	USD
CY2019Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	49594000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	-68615000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	160377000	USD
CY2020Q3	us-gaap	Interest Expense InterestExpense	10254000	USD
CY2019Q3	us-gaap	Interest Expense InterestExpense	10431000	USD
	us-gaap	Interest Expense InterestExpense	30891000	USD
	us-gaap	Interest Expense InterestExpense	37061000	USD
CY2020Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2019Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-29282000	USD
CY2020Q3	us-gaap	Other Expenses OtherExpenses	10254000	USD
CY2019Q3	us-gaap	Other Expenses OtherExpenses	10431000	USD
	us-gaap	Other Expenses OtherExpenses	30891000	USD
	us-gaap	Other Expenses OtherExpenses	66343000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	7216000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	39163000	USD
	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-99506000	USD
	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	94034000	USD
CY2020Q3	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Before Income Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax	0	USD
CY2019Q3	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Before Income Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax	7000	USD
	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Before Income Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax	0	USD
	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Before Income Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax	206000	USD
CY2020Q3	us-gaap	Profit Loss ProfitLoss	7216000	USD
CY2019Q3	us-gaap	Profit Loss ProfitLoss	39170000	USD
	us-gaap	Profit Loss ProfitLoss	-99506000	USD
	us-gaap	Profit Loss ProfitLoss	94240000	USD
CY2020Q3	nrp	Income Lossfrom Continuing Operations Including Portion Attributableto Noncontrolling Interest Allocatedto Preferred Unit Holders IncomeLossfromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoPreferredUnitHolders	7500000	USD
CY2019Q3	nrp	Income Lossfrom Continuing Operations Including Portion Attributableto Noncontrolling Interest Allocatedto Preferred Unit Holders IncomeLossfromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoPreferredUnitHolders	7500000	USD
	nrp	Income Lossfrom Continuing Operations Including Portion Attributableto Noncontrolling Interest Allocatedto Preferred Unit Holders IncomeLossfromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoPreferredUnitHolders	22613000	USD
	nrp	Income Lossfrom Continuing Operations Including Portion Attributableto Noncontrolling Interest Allocatedto Preferred Unit Holders IncomeLossfromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoPreferredUnitHolders	22500000	USD
CY2020Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-284000	USD
CY2019Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	31670000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-122119000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	71740000	USD
CY2020Q3	us-gaap	Net Income Loss Allocated To Limited Partners NetIncomeLossAllocatedToLimitedPartners	-279000	USD
CY2019Q3	us-gaap	Net Income Loss Allocated To Limited Partners NetIncomeLossAllocatedToLimitedPartners	31036000	USD
	us-gaap	Net Income Loss Allocated To Limited Partners NetIncomeLossAllocatedToLimitedPartners	-119677000	USD
	us-gaap	Net Income Loss Allocated To Limited Partners NetIncomeLossAllocatedToLimitedPartners	70305000	USD
CY2020Q3	us-gaap	Net Income Loss Allocated To General Partners NetIncomeLossAllocatedToGeneralPartners	-5000	USD
CY2019Q3	us-gaap	Net Income Loss Allocated To General Partners NetIncomeLossAllocatedToGeneralPartners	634000	USD
	us-gaap	Net Income Loss Allocated To General Partners NetIncomeLossAllocatedToGeneralPartners	-2442000	USD
	us-gaap	Net Income Loss Allocated To General Partners NetIncomeLossAllocatedToGeneralPartners	1435000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Per Outstanding Limited Partnership Unit Basic Net Of Tax IncomeLossFromContinuingOperationsPerOutstandingLimitedPartnershipUnitBasicNetOfTax	-0.02
CY2019Q3	us-gaap	Income Loss From Continuing Operations Per Outstanding Limited Partnership Unit Basic Net Of Tax IncomeLossFromContinuingOperationsPerOutstandingLimitedPartnershipUnitBasicNetOfTax	2.53
	us-gaap	Income Loss From Continuing Operations Per Outstanding Limited Partnership Unit Basic Net Of Tax IncomeLossFromContinuingOperationsPerOutstandingLimitedPartnershipUnitBasicNetOfTax	-9.76
	us-gaap	Income Loss From Continuing Operations Per Outstanding Limited Partnership Unit Basic Net Of Tax IncomeLossFromContinuingOperationsPerOutstandingLimitedPartnershipUnitBasicNetOfTax	5.72
CY2020Q3	us-gaap	Income Loss From Continuing Operations Net Of Tax Per Outstanding Limited Partnership Unit Diluted IncomeLossFromContinuingOperationsNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted	-0.02
CY2019Q3	us-gaap	Income Loss From Continuing Operations Net Of Tax Per Outstanding Limited Partnership Unit Diluted IncomeLossFromContinuingOperationsNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted	1.66
	us-gaap	Income Loss From Continuing Operations Net Of Tax Per Outstanding Limited Partnership Unit Diluted IncomeLossFromContinuingOperationsNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted	-9.76
	us-gaap	Income Loss From Continuing Operations Net Of Tax Per Outstanding Limited Partnership Unit Diluted IncomeLossFromContinuingOperationsNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted	3.91
CY2020Q3	us-gaap	Net Income Loss Per Outstanding Limited Partnership Unit Basic Net Of Tax NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax	-0.02
CY2019Q3	us-gaap	Net Income Loss Per Outstanding Limited Partnership Unit Basic Net Of Tax NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax	2.53
	us-gaap	Net Income Loss Per Outstanding Limited Partnership Unit Basic Net Of Tax NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax	-9.76
	us-gaap	Net Income Loss Per Outstanding Limited Partnership Unit Basic Net Of Tax NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax	5.73
CY2020Q3	us-gaap	Net Income Loss Net Of Tax Per Outstanding Limited Partnership Unit Diluted NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted	-0.02
CY2019Q3	us-gaap	Net Income Loss Net Of Tax Per Outstanding Limited Partnership Unit Diluted NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted	1.66
	us-gaap	Net Income Loss Net Of Tax Per Outstanding Limited Partnership Unit Diluted NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted	-9.76
	us-gaap	Net Income Loss Net Of Tax Per Outstanding Limited Partnership Unit Diluted NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted	3.92
CY2020Q3	us-gaap	Profit Loss ProfitLoss	7216000	USD
CY2019Q3	us-gaap	Profit Loss ProfitLoss	39170000	USD
	us-gaap	Profit Loss ProfitLoss	-99506000	USD
	us-gaap	Profit Loss ProfitLoss	94240000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	2428000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-520000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	2764000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-340000	USD
CY2020Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	9644000	USD
CY2019Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	38650000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-96742000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	93900000	USD
CY2019Q4	us-gaap	Partners Capital Including Portion Attributable To Noncontrolling Interest PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest	336028000	USD
CY2020Q1	us-gaap	Profit Loss ProfitLoss	18779000	USD
CY2020Q1	nrp	Partners Capital Account Unitbased Compensation Amortization PartnersCapitalAccountUnitbasedCompensationAmortization	673000	USD
CY2020Q1	nrp	Other Comprehensive Income Loss Netof Tax Portion Attributableto Parent Excluding General Partner Distributions OtherComprehensiveIncomeLossNetofTaxPortionAttributabletoParentExcludingGeneralPartnerDistributions	-1023000	USD
CY2020Q1	us-gaap	Partners Capital Including Portion Attributable To Noncontrolling Interest PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest	337416000	USD
CY2020Q2	us-gaap	Profit Loss ProfitLoss	-125501000	USD
CY2020Q2	us-gaap	Minority Interest Decrease From Redemptions MinorityInterestDecreaseFromRedemptions	-1909000	USD
CY2020Q2	nrp	Partners Capital Account Unitbased Compensation Amortization PartnersCapitalAccountUnitbasedCompensationAmortization	869000	USD
CY2019Q2	nrp	Partners Capital Account Unitbased Compensation Amortization PartnersCapitalAccountUnitbasedCompensationAmortization	460000	USD
CY2019Q2	nrp	Other Comprehensive Income Loss Netof Tax Portion Attributableto Parent Excluding General Partner Distributions OtherComprehensiveIncomeLossNetofTaxPortionAttributabletoParentExcludingGeneralPartnerDistributions	-825000	USD
CY2019Q2	us-gaap	Partners Capital Including Portion Attributable To Noncontrolling Interest PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest	440261000	USD
CY2019Q3	us-gaap	Profit Loss ProfitLoss	39170000	USD
CY2019Q3	nrp	Partners Capital Account Unitbased Compensation Amortization PartnersCapitalAccountUnitbasedCompensationAmortization	473000	USD
	us-gaap	Profit Loss ProfitLoss	-99506000	USD
CY2020Q2	nrp	Other Comprehensive Income Loss Netof Tax Portion Attributableto Parent Excluding General Partner Distributions OtherComprehensiveIncomeLossNetofTaxPortionAttributabletoParentExcludingGeneralPartnerDistributions	1359000	USD
CY2020Q2	us-gaap	Partners Capital Including Portion Attributable To Noncontrolling Interest PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest	204621000	USD
CY2020Q3	us-gaap	Profit Loss ProfitLoss	7216000	USD
CY2020Q3	us-gaap	Minority Interest Decrease From Redemptions MinorityInterestDecreaseFromRedemptions	-7500000	USD
CY2020Q3	nrp	Partners Capital Account Unitbased Compensation Amortization PartnersCapitalAccountUnitbasedCompensationAmortization	824000	USD
CY2020Q3	nrp	Other Comprehensive Income Loss Netof Tax Portion Attributableto Parent Excluding General Partner Distributions OtherComprehensiveIncomeLossNetofTaxPortionAttributabletoParentExcludingGeneralPartnerDistributions	2428000	USD
CY2020Q3	us-gaap	Partners Capital Including Portion Attributable To Noncontrolling Interest PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest	201959000	USD
CY2020Q1	nrp	Income Lossfrom Continuing Operations Including Portion Attributableto Noncontrolling Interest Allocatedto Preferred Unit Holders IncomeLossfromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoPreferredUnitHolders	7500000	USD
CY2020Q3	nrp	Income Lossfrom Continuing Operations Including Portion Attributableto Noncontrolling Interest Allocatedto Preferred Unit Holders IncomeLossfromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoPreferredUnitHolders	7500000	USD
CY2020Q2	nrp	Income Lossfrom Continuing Operations Including Portion Attributableto Noncontrolling Interest Allocatedto Preferred Unit Holders IncomeLossfromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoPreferredUnitHolders	7600000	USD
CY2018Q4	us-gaap	Partners Capital Including Portion Attributable To Noncontrolling Interest PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest	420546000	USD
CY2019Q1	us-gaap	Profit Loss ProfitLoss	35719000	USD
CY2019Q1	us-gaap	Partners Capital Account Unit Based Compensation PartnersCapitalAccountUnitBasedCompensation	486000	USD
CY2019Q1	nrp	Partners Capital Account Unitbased Compensation Amortization PartnersCapitalAccountUnitbasedCompensationAmortization	399000	USD
CY2019Q1	nrp	Other Comprehensive Income Loss Netof Tax Portion Attributableto Parent Excluding General Partner Distributions OtherComprehensiveIncomeLossNetofTaxPortionAttributabletoParentExcludingGeneralPartnerDistributions	1015000	USD
CY2019Q1	us-gaap	Partners Capital Including Portion Attributable To Noncontrolling Interest PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest	445040000	USD
CY2019Q2	us-gaap	Profit Loss ProfitLoss	19351000	USD
CY2019Q2	nrp	Income Lossfrom Continuing Operations Including Portion Attributableto Noncontrolling Interest Allocatedto Preferred Unit Holders IncomeLossfromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoPreferredUnitHolders	7500000	USD
CY2019Q1	nrp	Income Lossfrom Continuing Operations Including Portion Attributableto Noncontrolling Interest Allocatedto Preferred Unit Holders IncomeLossfromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoPreferredUnitHolders	7500000	USD
CY2019Q3	nrp	Other Comprehensive Income Loss Netof Tax Portion Attributableto Parent Excluding General Partner Distributions OtherComprehensiveIncomeLossNetofTaxPortionAttributabletoParentExcludingGeneralPartnerDistributions	-520000	USD
CY2019Q3	us-gaap	Partners Capital Including Portion Attributable To Noncontrolling Interest PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest	466254000	USD
CY2019Q3	nrp	Income Lossfrom Continuing Operations Including Portion Attributableto Noncontrolling Interest Allocatedto Preferred Unit Holders IncomeLossfromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoPreferredUnitHolders	7500000	USD
	us-gaap	Profit Loss ProfitLoss	94240000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	6185000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	11746000	USD
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	14210000	USD
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	25480000	USD
	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	465000	USD
	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	6609000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-29282000	USD
	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Before Income Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax	0	USD
	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Before Income Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax	206000	USD
	us-gaap	Asset Impairment Charges AssetImpairmentCharges	133217000	USD
	us-gaap	Asset Impairment Charges AssetImpairmentCharges	484000	USD
	us-gaap	Provision For Other Losses ProvisionForOtherLosses	3915000	USD
	us-gaap	Provision For Other Losses ProvisionForOtherLosses	6842000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	2566000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	1842000	USD
	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	491000	USD
	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	3223000	USD
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-7994000	USD
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	2111000	USD
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	193000	USD
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-822000	USD
	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-2985000	USD
	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-5083000	USD
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	6957000	USD
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	19000	USD
	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	10194000	USD
	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	-3920000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	3353000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-351000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	74413000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	117925000	USD
	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	1706000	USD
	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	-4000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	76119000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	117921000	USD
	us-gaap	Payments For Proceeds From Productive Assets PaymentsForProceedsFromProductiveAssets	-507000	USD
	us-gaap	Payments For Proceeds From Productive Assets PaymentsForProceedsFromProductiveAssets	-6611000	USD
	us-gaap	Proceeds From Collection Of Lease Receivables ProceedsFromCollectionOfLeaseReceivables	1462000	USD
	us-gaap	Proceeds From Collection Of Lease Receivables ProceedsFromCollectionOfLeaseReceivables	1351000	USD
	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	1000000	USD
	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	0	USD
	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	969000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	7962000	USD
	us-gaap	Cash Provided By Used In Investing Activities Discontinued Operations CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations	-66000	USD
	us-gaap	Cash Provided By Used In Investing Activities Discontinued Operations CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations	-556000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	903000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	7406000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	300000000	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	25841000	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	442747000	USD
	nrp	Proceeds From Paymentsto Discontinued Operations ProceedsFromPaymentstoDiscontinuedOperations	-1640000	USD
	nrp	Proceeds From Paymentsto Discontinued Operations ProceedsFromPaymentstoDiscontinuedOperations	560000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	0	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-26427000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-58074000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-219754000	USD
	us-gaap	Cash Provided By Used In Financing Activities Discontinued Operations CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations	-1640000	USD
	us-gaap	Cash Provided By Used In Financing Activities Discontinued Operations CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations	560000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-59714000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-219194000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	17308000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-93867000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	98265000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	206030000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	115573000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	112163000	USD
	us-gaap	Interest Paid Net InterestPaidNet	22712000	USD
	us-gaap	Interest Paid Net InterestPaidNet	36270000	USD
	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	947000	USD
	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	0	USD
	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	2	segment
CY2020Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	27944000	USD
CY2019Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	43784000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	95490000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	168777000	USD
CY2019Q4	us-gaap	Deferred Revenue DeferredRevenue	51821000	USD
CY2018Q4	us-gaap	Deferred Revenue DeferredRevenue	52553000	USD
	nrp	Deferred Revenue Contractual Minimum Payments DeferredRevenueContractualMinimumPayments	38005000	USD
	nrp	Deferred Revenue Contractual Minimum Payments DeferredRevenueContractualMinimumPayments	37315000	USD
	us-gaap	Deferred Revenue Revenue Recognized1 DeferredRevenueRevenueRecognized1	27811000	USD
	us-gaap	Deferred Revenue Revenue Recognized1 DeferredRevenueRevenueRecognized1	41234000	USD
CY2020Q3	us-gaap	Deferred Revenue DeferredRevenue	62015000	USD
CY2020Q3	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	7478000	USD
CY2019Q3	us-gaap	Deferred Revenue DeferredRevenue	48634000	USD
CY2020Q3	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P3Y8M12D
CY2020Q3	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	14792000	USD
CY2020Q3	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P5Y8M12D
CY2020Q3	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P13Y6M
CY2020Q3	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	30922000	USD
CY2020Q3	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P9Y3M18D
CY2020Q3	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	53192000	USD
	nrp	Paymentsfor Proceedsfrom Loans Receivable Annual Minimum Payment PaymentsforProceedsfromLoansReceivableAnnualMinimumPayment	5000000.0	USD
CY2019Q3	nrp	Income Lossfrom Continuing Operations Including Portion Attributableto Noncontrolling Interest Allocatedto Preferred Unit Holders IncomeLossfromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoPreferredUnitHolders	7500000	USD
CY2020Q3	nrp	Income Lossfrom Continuing Operations Including Portion Attributableto Noncontrolling Interest Allocatedto Preferred Unit Holders IncomeLossfromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoPreferredUnitHolders	7500000	USD
	nrp	Income Lossfrom Continuing Operations Including Portion Attributableto Noncontrolling Interest Allocatedto Preferred Unit Holders IncomeLossfromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoPreferredUnitHolders	22600000	USD
	nrp	Income Lossfrom Continuing Operations Including Portion Attributableto Noncontrolling Interest Allocatedto Preferred Unit Holders IncomeLossfromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoPreferredUnitHolders	22500000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	7216000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	39163000	USD
	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-99506000	USD
	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	94034000	USD
CY2020Q3	nrp	Income Lossfrom Continuing Operations Including Portion Attributableto Noncontrolling Interest Allocatedto Preferred Unit Holders IncomeLossfromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoPreferredUnitHolders	7500000	USD
CY2019Q3	nrp	Income Lossfrom Continuing Operations Including Portion Attributableto Noncontrolling Interest Allocatedto Preferred Unit Holders IncomeLossfromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoPreferredUnitHolders	7500000	USD
	nrp	Income Lossfrom Continuing Operations Including Portion Attributableto Noncontrolling Interest Allocatedto Preferred Unit Holders IncomeLossfromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoPreferredUnitHolders	22613000	USD
	nrp	Income Lossfrom Continuing Operations Including Portion Attributableto Noncontrolling Interest Allocatedto Preferred Unit Holders IncomeLossfromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoPreferredUnitHolders	22500000	USD
CY2020Q3	nrp	Income Lossfrom Continuing Operationsand Income Attributableto Preferred Unitholders Including Portion Attributableto Noncontrolling Interest Allocatedto General Partnerand Limited Partners IncomeLossfromContinuingOperationsandIncomeAttributabletoPreferredUnitholdersIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoGeneralPartnerandLimitedPartners	-284000	USD
CY2019Q3	nrp	Income Lossfrom Continuing Operationsand Income Attributableto Preferred Unitholders Including Portion Attributableto Noncontrolling Interest Allocatedto General Partnerand Limited Partners IncomeLossfromContinuingOperationsandIncomeAttributabletoPreferredUnitholdersIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoGeneralPartnerandLimitedPartners	31663000	USD
	nrp	Income Lossfrom Continuing Operationsand Income Attributableto Preferred Unitholders Including Portion Attributableto Noncontrolling Interest Allocatedto General Partnerand Limited Partners IncomeLossfromContinuingOperationsandIncomeAttributabletoPreferredUnitholdersIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoGeneralPartnerandLimitedPartners	-122119000	USD
	nrp	Income Lossfrom Continuing Operationsand Income Attributableto Preferred Unitholders Including Portion Attributableto Noncontrolling Interest Allocatedto General Partnerand Limited Partners IncomeLossfromContinuingOperationsandIncomeAttributabletoPreferredUnitholdersIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoGeneralPartnerandLimitedPartners	71534000	USD
CY2020Q3	nrp	Income Lossfrom Continuing Operationsand Income Attributableto Preferred Unitholders Including Portion Attributableto Noncontrolling Interest Allocatedto General Partner IncomeLossfromContinuingOperationsandIncomeAttributabletoPreferredUnitholdersIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoGeneralPartner	-5000	USD
CY2019Q3	nrp	Income Lossfrom Continuing Operationsand Income Attributableto Preferred Unitholders Including Portion Attributableto Noncontrolling Interest Allocatedto General Partner IncomeLossfromContinuingOperationsandIncomeAttributabletoPreferredUnitholdersIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoGeneralPartner	634000	USD
	nrp	Income Lossfrom Continuing Operationsand Income Attributableto Preferred Unitholders Including Portion Attributableto Noncontrolling Interest Allocatedto General Partner IncomeLossfromContinuingOperationsandIncomeAttributabletoPreferredUnitholdersIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoGeneralPartner	-2442000	USD
	nrp	Income Lossfrom Continuing Operationsand Income Attributableto Preferred Unitholders Including Portion Attributableto Noncontrolling Interest Allocatedto General Partner IncomeLossfromContinuingOperationsandIncomeAttributabletoPreferredUnitholdersIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoGeneralPartner	1431000	USD
CY2020Q3	nrp	Income Lossfrom Continuing Operations Including Portion Attributableto Noncontrolling Interest Allocatedto Limited Partners IncomeLossfromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoLimitedPartners	-279000	USD
CY2019Q3	nrp	Income Lossfrom Continuing Operations Including Portion Attributableto Noncontrolling Interest Allocatedto Limited Partners IncomeLossfromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoLimitedPartners	31029000	USD
	nrp	Income Lossfrom Continuing Operations Including Portion Attributableto Noncontrolling Interest Allocatedto Limited Partners IncomeLossfromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoLimitedPartners	-119677000	USD
	nrp	Income Lossfrom Continuing Operations Including Portion Attributableto Noncontrolling Interest Allocatedto Limited Partners IncomeLossfromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoLimitedPartners	70103000	USD
CY2020Q3	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Before Income Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax	0	USD
CY2019Q3	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Before Income Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax	7000	USD
	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Before Income Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax	0	USD
	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Before Income Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax	206000	USD
CY2020Q3	nrp	Net Income Lossfrom Discontinued Operations Allocatedto General Partner NetIncomeLossfromDiscontinuedOperationsAllocatedtoGeneralPartner	0	USD
CY2019Q3	nrp	Net Income Lossfrom Discontinued Operations Allocatedto General Partner NetIncomeLossfromDiscontinuedOperationsAllocatedtoGeneralPartner	0	USD
	nrp	Net Income Lossfrom Discontinued Operations Allocatedto General Partner NetIncomeLossfromDiscontinuedOperationsAllocatedtoGeneralPartner	0	USD
	nrp	Net Income Lossfrom Discontinued Operations Allocatedto General Partner NetIncomeLossfromDiscontinuedOperationsAllocatedtoGeneralPartner	-4000	USD
CY2020Q3	nrp	Net Income Loss Allocatedto Common Unitholders Discontinued Operations NetIncomeLossAllocatedtoCommonUnitholdersDiscontinuedOperations	0	USD
CY2019Q3	nrp	Net Income Loss Allocatedto Common Unitholders Discontinued Operations NetIncomeLossAllocatedtoCommonUnitholdersDiscontinuedOperations	7000	USD
	nrp	Net Income Loss Allocatedto Common Unitholders Discontinued Operations NetIncomeLossAllocatedtoCommonUnitholdersDiscontinuedOperations	0	USD
	nrp	Net Income Loss Allocatedto Common Unitholders Discontinued Operations NetIncomeLossAllocatedtoCommonUnitholdersDiscontinuedOperations	202000	USD
CY2020Q3	us-gaap	Profit Loss ProfitLoss	7216000	USD
CY2019Q3	us-gaap	Profit Loss ProfitLoss	39170000	USD
	us-gaap	Profit Loss ProfitLoss	-99506000	USD
	us-gaap	Profit Loss ProfitLoss	94240000	USD
CY2020Q3	nrp	Income Lossfrom Continuing Operations Including Portion Attributableto Noncontrolling Interest Allocatedto Preferred Unit Holders IncomeLossfromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoPreferredUnitHolders	7500000	USD
CY2019Q3	nrp	Income Lossfrom Continuing Operations Including Portion Attributableto Noncontrolling Interest Allocatedto Preferred Unit Holders IncomeLossfromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoPreferredUnitHolders	7500000	USD
	nrp	Income Lossfrom Continuing Operations Including Portion Attributableto Noncontrolling Interest Allocatedto Preferred Unit Holders IncomeLossfromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoPreferredUnitHolders	22613000	USD
	nrp	Income Lossfrom Continuing Operations Including Portion Attributableto Noncontrolling Interest Allocatedto Preferred Unit Holders IncomeLossfromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoPreferredUnitHolders	22500000	USD
CY2020Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-284000	USD
CY2019Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	31670000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-122119000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	71740000	USD
CY2020Q3	us-gaap	Net Income Loss Allocated To General Partners NetIncomeLossAllocatedToGeneralPartners	-5000	USD
CY2019Q3	us-gaap	Net Income Loss Allocated To General Partners NetIncomeLossAllocatedToGeneralPartners	634000	USD
	us-gaap	Net Income Loss Allocated To General Partners NetIncomeLossAllocatedToGeneralPartners	-2442000	USD
	us-gaap	Net Income Loss Allocated To General Partners NetIncomeLossAllocatedToGeneralPartners	1435000	USD
CY2020Q3	us-gaap	Net Income Loss Allocated To Limited Partners NetIncomeLossAllocatedToLimitedPartners	-279000	USD
CY2019Q3	us-gaap	Net Income Loss Allocated To Limited Partners NetIncomeLossAllocatedToLimitedPartners	31036000	USD
	us-gaap	Net Income Loss Allocated To Limited Partners NetIncomeLossAllocatedToLimitedPartners	-119677000	USD
	us-gaap	Net Income Loss Allocated To Limited Partners NetIncomeLossAllocatedToLimitedPartners	70305000	USD
CY2020Q3	us-gaap	Weighted Average Limited Partnership Units Outstanding WeightedAverageLimitedPartnershipUnitsOutstanding	12261000	shares
CY2019Q3	us-gaap	Weighted Average Limited Partnership Units Outstanding WeightedAverageLimitedPartnershipUnitsOutstanding	12261000	shares
	us-gaap	Weighted Average Limited Partnership Units Outstanding WeightedAverageLimitedPartnershipUnitsOutstanding	12261000	shares
	us-gaap	Weighted Average Limited Partnership Units Outstanding WeightedAverageLimitedPartnershipUnitsOutstanding	12259000	shares
CY2020Q3	us-gaap	Income Loss From Continuing Operations Per Outstanding Limited Partnership Unit Basic Net Of Tax IncomeLossFromContinuingOperationsPerOutstandingLimitedPartnershipUnitBasicNetOfTax	-0.02
CY2019Q3	us-gaap	Income Loss From Continuing Operations Per Outstanding Limited Partnership Unit Basic Net Of Tax IncomeLossFromContinuingOperationsPerOutstandingLimitedPartnershipUnitBasicNetOfTax	2.53
	us-gaap	Income Loss From Continuing Operations Per Outstanding Limited Partnership Unit Basic Net Of Tax IncomeLossFromContinuingOperationsPerOutstandingLimitedPartnershipUnitBasicNetOfTax	-9.76
	us-gaap	Income Loss From Continuing Operations Per Outstanding Limited Partnership Unit Basic Net Of Tax IncomeLossFromContinuingOperationsPerOutstandingLimitedPartnershipUnitBasicNetOfTax	5.72
CY2020Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Outstanding Limited Partnership Unit Basic IncomeLossFromDiscontinuedOperationsNetOfTaxPerOutstandingLimitedPartnershipUnitBasic	0.00
CY2019Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Outstanding Limited Partnership Unit Basic IncomeLossFromDiscontinuedOperationsNetOfTaxPerOutstandingLimitedPartnershipUnitBasic	0.00
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Outstanding Limited Partnership Unit Basic IncomeLossFromDiscontinuedOperationsNetOfTaxPerOutstandingLimitedPartnershipUnitBasic	0.00
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Outstanding Limited Partnership Unit Basic IncomeLossFromDiscontinuedOperationsNetOfTaxPerOutstandingLimitedPartnershipUnitBasic	0.02
CY2020Q3	us-gaap	Net Income Loss Per Outstanding Limited Partnership Unit Basic Net Of Tax NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax	-0.02
CY2019Q3	us-gaap	Net Income Loss Per Outstanding Limited Partnership Unit Basic Net Of Tax NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax	2.53
	us-gaap	Net Income Loss Per Outstanding Limited Partnership Unit Basic Net Of Tax NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax	-9.76
	us-gaap	Net Income Loss Per Outstanding Limited Partnership Unit Basic Net Of Tax NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax	5.73
CY2020Q3	us-gaap	Weighted Average Limited Partnership Units Outstanding WeightedAverageLimitedPartnershipUnitsOutstanding	12261000	shares
CY2019Q3	us-gaap	Weighted Average Limited Partnership Units Outstanding WeightedAverageLimitedPartnershipUnitsOutstanding	12261000	shares
	us-gaap	Weighted Average Limited Partnership Units Outstanding WeightedAverageLimitedPartnershipUnitsOutstanding	12261000	shares
	us-gaap	Weighted Average Limited Partnership Units Outstanding WeightedAverageLimitedPartnershipUnitsOutstanding	12259000	shares
CY2020Q3	nrp	Weighted Average Number Diluted Limited Partnership Units Outstanding Adjustment Effectof Preferred Units WeightedAverageNumberDilutedLimitedPartnershipUnitsOutstandingAdjustmentEffectofPreferredUnits	0	shares
CY2019Q3	nrp	Weighted Average Number Diluted Limited Partnership Units Outstanding Adjustment Effectof Preferred Units WeightedAverageNumberDilutedLimitedPartnershipUnitsOutstandingAdjustmentEffectofPreferredUnits	10494000	shares
	nrp	Weighted Average Number Diluted Limited Partnership Units Outstanding Adjustment Effectof Preferred Units WeightedAverageNumberDilutedLimitedPartnershipUnitsOutstandingAdjustmentEffectofPreferredUnits	0	shares
	nrp	Weighted Average Number Diluted Limited Partnership Units Outstanding Adjustment Effectof Preferred Units WeightedAverageNumberDilutedLimitedPartnershipUnitsOutstandingAdjustmentEffectofPreferredUnits	10494000	shares
CY2020Q3	nrp	Weighted Average Number Diluted Limited Partnership Units Outstanding Adjustment Effectof Warrants WeightedAverageNumberDilutedLimitedPartnershipUnitsOutstandingAdjustmentEffectofWarrants	0	shares
CY2019Q3	nrp	Weighted Average Number Diluted Limited Partnership Units Outstanding Adjustment Effectof Warrants WeightedAverageNumberDilutedLimitedPartnershipUnitsOutstandingAdjustmentEffectofWarrants	389000	shares
	nrp	Weighted Average Number Diluted Limited Partnership Units Outstanding Adjustment Effectof Warrants WeightedAverageNumberDilutedLimitedPartnershipUnitsOutstandingAdjustmentEffectofWarrants	0	shares
	nrp	Weighted Average Number Diluted Limited Partnership Units Outstanding Adjustment Effectof Warrants WeightedAverageNumberDilutedLimitedPartnershipUnitsOutstandingAdjustmentEffectofWarrants	800000	shares
CY2019Q3	nrp	Weighted Average Number Diluted Limited Partnership Units Outstanding Adjustment Unit Based Awards WeightedAverageNumberDilutedLimitedPartnershipUnitsOutstandingAdjustmentUnitBasedAwards	13000	shares
	nrp	Weighted Average Number Diluted Limited Partnership Units Outstanding Adjustment Unit Based Awards WeightedAverageNumberDilutedLimitedPartnershipUnitsOutstandingAdjustmentUnitBasedAwards	31000	shares
CY2020Q3	us-gaap	Weighted Average Limited Partnership Units Outstanding Diluted WeightedAverageLimitedPartnershipUnitsOutstandingDiluted	12261000	shares
CY2019Q3	us-gaap	Weighted Average Limited Partnership Units Outstanding Diluted WeightedAverageLimitedPartnershipUnitsOutstandingDiluted	23157000	shares
	us-gaap	Weighted Average Limited Partnership Units Outstanding Diluted WeightedAverageLimitedPartnershipUnitsOutstandingDiluted	12261000	shares
	us-gaap	Weighted Average Limited Partnership Units Outstanding Diluted WeightedAverageLimitedPartnershipUnitsOutstandingDiluted	23584000	shares
CY2020Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	7216000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	39163000	USD
	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-99506000	USD
	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	94034000	USD
CY2020Q3	nrp	Income Lossfrom Continuing Operations Including Portion Attributableto Noncontrolling Interest Allocatedto Preferred Unit Holders IncomeLossfromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoPreferredUnitHolders	7500000	USD
CY2019Q3	nrp	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest Allocated To Preferred Unit Holders Dilutive Effect IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterestAllocatedToPreferredUnitHoldersDilutiveEffect	0	USD
	nrp	Income Lossfrom Continuing Operations Including Portion Attributableto Noncontrolling Interest Allocatedto Preferred Unit Holders IncomeLossfromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoPreferredUnitHolders	22613000	USD
	nrp	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest Allocated To Preferred Unit Holders Dilutive Effect IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterestAllocatedToPreferredUnitHoldersDilutiveEffect	0	USD
CY2020Q3	nrp	Diluted Income Loss From Continuing Operations Net Of Tax Including Portion Attributable To Noncontrolling Interest DilutedIncomeLossFromContinuingOperationsNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-284000	USD
CY2019Q3	nrp	Diluted Income Loss From Continuing Operations Net Of Tax Including Portion Attributable To Noncontrolling Interest DilutedIncomeLossFromContinuingOperationsNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	39163000	USD
	nrp	Diluted Income Loss From Continuing Operations Net Of Tax Including Portion Attributable To Noncontrolling Interest DilutedIncomeLossFromContinuingOperationsNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-122119000	USD
	nrp	Diluted Income Loss From Continuing Operations Net Of Tax Including Portion Attributable To Noncontrolling Interest DilutedIncomeLossFromContinuingOperationsNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	94034000	USD
CY2020Q3	nrp	Income Lossfrom Continuing Operationsand Other Incomefrom Warrant Liability Fair Value Adjustments Including Portion Attributableto Noncontrolling Interest Allocatedto General Partner IncomeLossfromContinuingOperationsandOtherIncomefromWarrantLiabilityFairValueAdjustmentsIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoGeneralPartner	-5000	USD
CY2019Q3	nrp	Income Lossfrom Continuing Operationsand Other Incomefrom Warrant Liability Fair Value Adjustments Including Portion Attributableto Noncontrolling Interest Allocatedto General Partner IncomeLossfromContinuingOperationsandOtherIncomefromWarrantLiabilityFairValueAdjustmentsIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoGeneralPartner	784000	USD
	nrp	Income Lossfrom Continuing Operationsand Other Incomefrom Warrant Liability Fair Value Adjustments Including Portion Attributableto Noncontrolling Interest Allocatedto General Partner IncomeLossfromContinuingOperationsandOtherIncomefromWarrantLiabilityFairValueAdjustmentsIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoGeneralPartner	-2442000	USD
	nrp	Income Lossfrom Continuing Operationsand Other Incomefrom Warrant Liability Fair Value Adjustments Including Portion Attributableto Noncontrolling Interest Allocatedto General Partner IncomeLossfromContinuingOperationsandOtherIncomefromWarrantLiabilityFairValueAdjustmentsIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoGeneralPartner	1881000	USD
CY2020Q3	nrp	Diluted Income Lossfrom Continuing Operations Attributableto Parent DilutedIncomeLossfromContinuingOperationsAttributabletoParent	-279000	USD
CY2019Q3	nrp	Diluted Income Lossfrom Continuing Operations Attributableto Parent DilutedIncomeLossfromContinuingOperationsAttributabletoParent	38379000	USD
	nrp	Diluted Income Lossfrom Continuing Operations Attributableto Parent DilutedIncomeLossfromContinuingOperationsAttributabletoParent	-119677000	USD
	nrp	Diluted Income Lossfrom Continuing Operations Attributableto Parent DilutedIncomeLossfromContinuingOperationsAttributabletoParent	92153000	USD
CY2020Q3	nrp	Net Income Loss Availableto Common Stockholders Discontinued Operations Diluted NetIncomeLossAvailabletoCommonStockholdersDiscontinuedOperationsDiluted	0	USD
CY2019Q3	nrp	Net Income Loss Availableto Common Stockholders Discontinued Operations Diluted NetIncomeLossAvailabletoCommonStockholdersDiscontinuedOperationsDiluted	7000	USD
	nrp	Net Income Loss Availableto Common Stockholders Discontinued Operations Diluted NetIncomeLossAvailabletoCommonStockholdersDiscontinuedOperationsDiluted	0	USD
	nrp	Net Income Loss Availableto Common Stockholders Discontinued Operations Diluted NetIncomeLossAvailabletoCommonStockholdersDiscontinuedOperationsDiluted	202000	USD
CY2020Q3	us-gaap	Profit Loss ProfitLoss	7216000	USD
CY2019Q3	us-gaap	Profit Loss ProfitLoss	39170000	USD
	us-gaap	Profit Loss ProfitLoss	-99506000	USD
	us-gaap	Profit Loss ProfitLoss	94240000	USD
CY2020Q3	nrp	Income Lossfrom Continuing Operations Including Portion Attributableto Noncontrolling Interest Allocatedto Preferred Unit Holders IncomeLossfromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoPreferredUnitHolders	7500000	USD
CY2019Q3	nrp	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest Allocated To Preferred Unit Holders Dilutive Effect IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterestAllocatedToPreferredUnitHoldersDilutiveEffect	0	USD
	nrp	Income Lossfrom Continuing Operations Including Portion Attributableto Noncontrolling Interest Allocatedto Preferred Unit Holders IncomeLossfromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterestAllocatedtoPreferredUnitHolders	22613000	USD
	nrp	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest Allocated To Preferred Unit Holders Dilutive Effect IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterestAllocatedToPreferredUnitHoldersDilutiveEffect	0	USD
CY2020Q3	nrp	Net Income Loss Allocated To General Partners And Limited Partners Diluted NetIncomeLossAllocatedToGeneralPartnersAndLimitedPartnersDiluted	-284000	USD
CY2019Q3	nrp	Net Income Loss Allocated To General Partners And Limited Partners Diluted NetIncomeLossAllocatedToGeneralPartnersAndLimitedPartnersDiluted	39170000	USD
	nrp	Net Income Loss Allocated To General Partners And Limited Partners Diluted NetIncomeLossAllocatedToGeneralPartnersAndLimitedPartnersDiluted	-122119000	USD
	nrp	Net Income Loss Allocated To General Partners And Limited Partners Diluted NetIncomeLossAllocatedToGeneralPartnersAndLimitedPartnersDiluted	94240000	USD
CY2020Q3	nrp	Income Loss Attributableto Parentand Other Incomefrom Warrant Liability Fair Value Adjustments Allocatedto General Partner IncomeLossAttributabletoParentandOtherIncomefromWarrantLiabilityFairValueAdjustmentsAllocatedtoGeneralPartner	-5000	USD
CY2019Q3	nrp	Income Loss Attributableto Parentand Other Incomefrom Warrant Liability Fair Value Adjustments Allocatedto General Partner IncomeLossAttributabletoParentandOtherIncomefromWarrantLiabilityFairValueAdjustmentsAllocatedtoGeneralPartner	784000	USD
	nrp	Income Loss Attributableto Parentand Other Incomefrom Warrant Liability Fair Value Adjustments Allocatedto General Partner IncomeLossAttributabletoParentandOtherIncomefromWarrantLiabilityFairValueAdjustmentsAllocatedtoGeneralPartner	-2442000	USD
	nrp	Income Loss Attributableto Parentand Other Incomefrom Warrant Liability Fair Value Adjustments Allocatedto General Partner IncomeLossAttributabletoParentandOtherIncomefromWarrantLiabilityFairValueAdjustmentsAllocatedtoGeneralPartner	1885000	USD
CY2020Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-279000	USD
CY2019Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	38386000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-119677000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	92355000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Net Of Tax Per Outstanding Limited Partnership Unit Diluted IncomeLossFromContinuingOperationsNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted	-0.02
CY2019Q3	us-gaap	Income Loss From Continuing Operations Net Of Tax Per Outstanding Limited Partnership Unit Diluted IncomeLossFromContinuingOperationsNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted	1.66
	us-gaap	Income Loss From Continuing Operations Net Of Tax Per Outstanding Limited Partnership Unit Diluted IncomeLossFromContinuingOperationsNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted	-9.76
	us-gaap	Income Loss From Continuing Operations Net Of Tax Per Outstanding Limited Partnership Unit Diluted IncomeLossFromContinuingOperationsNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted	3.91
CY2020Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Outstanding Limited Partnership Unit Diluted1 IncomeLossFromDiscontinuedOperationsNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted1	0.00
CY2019Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Outstanding Limited Partnership Unit Diluted1 IncomeLossFromDiscontinuedOperationsNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted1	0.00
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Outstanding Limited Partnership Unit Diluted1 IncomeLossFromDiscontinuedOperationsNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted1	0.00
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Outstanding Limited Partnership Unit Diluted1 IncomeLossFromDiscontinuedOperationsNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted1	0.01
CY2020Q3	us-gaap	Net Income Loss Net Of Tax Per Outstanding Limited Partnership Unit Diluted NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted	-0.02
CY2019Q3	us-gaap	Net Income Loss Net Of Tax Per Outstanding Limited Partnership Unit Diluted NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted	1.66
	us-gaap	Net Income Loss Net Of Tax Per Outstanding Limited Partnership Unit Diluted NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted	-9.76
	us-gaap	Net Income Loss Net Of Tax Per Outstanding Limited Partnership Unit Diluted NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted	3.92
	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	2	segment
CY2020Q3	us-gaap	Revenues Revenues	29930000	USD
CY2020Q3	nrp	Operating Costsand Expenses Including Affiliates OperatingCostsandExpensesIncludingAffiliates	5781000	USD
CY2020Q3	nrp	Depreciation Depletionand Amortization Including Related Parties DepreciationDepletionandAmortizationIncludingRelatedParties	2111000	USD
CY2020Q3	nrp	Generaland Administrative Expenseincludingaffiliates GeneralandAdministrativeExpenseincludingaffiliates	3634000	USD
CY2020Q3	us-gaap	Asset Impairment Charges AssetImpairmentCharges	934000	USD
CY2020Q3	us-gaap	Other Expenses OtherExpenses	10254000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	7216000	USD
CY2019Q3	us-gaap	Revenues Revenues	57602000	USD
CY2019Q3	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	6107000	USD
CY2019Q3	nrp	Operating Costsand Expenses Including Affiliates OperatingCostsandExpensesIncludingAffiliates	5994000	USD
CY2019Q3	nrp	Depreciation Depletionand Amortization Including Related Parties DepreciationDepletionandAmortizationIncludingRelatedParties	3384000	USD
CY2019Q3	nrp	Generaland Administrative Expenseincludingaffiliates GeneralandAdministrativeExpenseincludingaffiliates	4253000	USD
CY2019Q3	us-gaap	Asset Impairment Charges AssetImpairmentCharges	484000	USD
CY2019Q3	us-gaap	Other Expenses OtherExpenses	10431000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	39163000	USD
CY2019Q3	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Before Income Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax	7000	USD
	us-gaap	Revenues Revenues	100690000	USD
	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	465000	USD
	nrp	Operating Costsand Expenses Including Affiliates OperatingCostsandExpensesIncludingAffiliates	19200000	USD
	nrp	Depreciation Depletionand Amortization Including Related Parties DepreciationDepletionandAmortizationIncludingRelatedParties	6185000	USD
	nrp	Generaland Administrative Expenseincludingaffiliates GeneralandAdministrativeExpenseincludingaffiliates	11168000	USD
	us-gaap	Asset Impairment Charges AssetImpairmentCharges	133217000	USD
	us-gaap	Other Expenses OtherExpenses	30891000	USD
	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-99506000	USD
	us-gaap	Revenues Revenues	205610000	USD
	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	6609000	USD
	nrp	Operating Costsand Expenses Including Affiliates OperatingCostsandExpensesIncludingAffiliates	26813000	USD
	nrp	Depreciation Depletionand Amortization Including Related Parties DepreciationDepletionandAmortizationIncludingRelatedParties	11746000	USD
	nrp	Generaland Administrative Expenseincludingaffiliates GeneralandAdministrativeExpenseincludingaffiliates	12799000	USD
	us-gaap	Asset Impairment Charges AssetImpairmentCharges	484000	USD
	us-gaap	Other Expenses OtherExpenses	66343000	USD
	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	94034000	USD
	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Before Income Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax	206000	USD
CY2020Q3	us-gaap	Mineral Properties Gross MineralPropertiesGross	833482000	USD
CY2020Q3	us-gaap	Mineral Properties Accumulated Depletion MineralPropertiesAccumulatedDepletion	367612000	USD
CY2020Q3	us-gaap	Mineral Properties Net MineralPropertiesNet	465870000	USD
CY2019Q4	us-gaap	Mineral Properties Gross MineralPropertiesGross	1048389000	USD
CY2019Q4	us-gaap	Mineral Properties Accumulated Depletion MineralPropertiesAccumulatedDepletion	443293000	USD
CY2019Q4	us-gaap	Mineral Properties Net MineralPropertiesNet	605096000	USD
CY2020Q3	nrp	Depletion And Amortization Expense On Coal And Other Mineral Rights DepletionAndAmortizationExpenseOnCoalAndOtherMineralRights	2100000	USD
CY2019Q3	nrp	Depletion And Amortization Expense On Coal And Other Mineral Rights DepletionAndAmortizationExpenseOnCoalAndOtherMineralRights	2800000	USD
	nrp	Depletion And Amortization Expense On Coal And Other Mineral Rights DepletionAndAmortizationExpenseOnCoalAndOtherMineralRights	6000000.0	USD
	nrp	Depletion And Amortization Expense On Coal And Other Mineral Rights DepletionAndAmortizationExpenseOnCoalAndOtherMineralRights	9500000	USD
CY2020Q3	us-gaap	Asset Impairment Charges AssetImpairmentCharges	900000	USD
	us-gaap	Asset Impairment Charges AssetImpairmentCharges	133200000	USD
	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1	P1Y9M18D
CY2020Q3	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	498215000	USD
CY2019Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	524056000	USD
CY2020Q3	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	6742000	USD
CY2019Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	7858000	USD
CY2020Q3	us-gaap	Long Term Debt LongTermDebt	491473000	USD
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	516198000	USD
CY2020Q3	us-gaap	Long Term Debt Current LongTermDebtCurrent	39072000	USD
CY2019Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	45776000	USD
CY2020Q3	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	452401000	USD
CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	470422000	USD
CY2019Q2	us-gaap	Redemption Premium RedemptionPremium	18100000	USD
CY2019Q2	us-gaap	Write Off Of Deferred Debt Issuance Cost WriteOffOfDeferredDebtIssuanceCost	10400000	USD
CY2020Q3	us-gaap	Receivables Fair Value Disclosure ReceivablesFairValueDisclosure	35800000	USD
CY2019Q4	us-gaap	Receivables Fair Value Disclosure ReceivablesFairValueDisclosure	38945000	USD
CY2020Q3	nrp	Fairvaluepercentageofpar Fairvaluepercentageofpar	0.88
	nrp	Discount Rate DiscountRate	0.15
CY2020Q3	us-gaap	Embedded Derivative Fair Value Of Embedded Derivative Liability EmbeddedDerivativeFairValueOfEmbeddedDerivativeLiability	0	USD
CY2019Q4	us-gaap	Embedded Derivative Fair Value Of Embedded Derivative Liability EmbeddedDerivativeFairValueOfEmbeddedDerivativeLiability	0	USD
	nrp	Sharebased Compensation Arrangementby Sharebased Payment Award Equity Instruments Otherthan Options Grantsin Period Fair Value SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsGrantsinPeriodFairValue	3500000	USD
	nrp	Sharebased Compensation Arrangementby Sharebased Payment Award Equity Instruments Otherthan Options Grantsin Period Fair Value SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsGrantsinPeriodFairValue	5400000	USD
CY2020Q3	nrp	Unaccrued Cost Associated With Outstanding Grants And Related Distribution Equivalent Rights UnaccruedCostAssociatedWithOutstandingGrantsAndRelatedDistributionEquivalentRights	4400000	USD
CY2019Q4	nrp	Unaccrued Cost Associated With Outstanding Grants And Related Distribution Equivalent Rights UnaccruedCostAssociatedWithOutstandingGrantsAndRelatedDistributionEquivalentRights	3500000	USD
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	157000	shares
CY2019Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Exercise Price Beginning Balance1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1	37.48
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	203000	shares
	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	17.20
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber	0	shares
CY2020Q3	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Exercisable Options Weighted Average Exercise Price1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1	0
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	5000	shares
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	17.20
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	355000	shares
CY2020Q3	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Exercise Price Beginning Balance1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1	26.20
CY2020Q3	us-gaap	Lessor Operating Lease Renewal Term LessorOperatingLeaseRenewalTerm	P80Y
	nrp	Paymentsfor Proceedsfrom Loans Receivable Annual Minimum Payment PaymentsforProceedsfromLoansReceivableAnnualMinimumPayment	5000000.0	USD
	nrp	Paymentsfor Proceedsfrom Loans Receivable Annual Minimum Payment PaymentsforProceedsfromLoansReceivableAnnualMinimumPayment	5000000.0	USD
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020Q3	nrp	Shortterm Receivables Gross ShorttermReceivablesGross	24172000	USD
CY2020Q3	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	2324000	USD
CY2020Q3	nrp	Shorttermreceivablesnetof Cecl ShorttermreceivablesnetofCECL	21848000	USD
CY2020Q3	us-gaap	Contract With Customer Asset Gross ContractWithCustomerAssetGross	35370000	USD
CY2020Q3	us-gaap	Contract With Customer Asset Accumulated Allowance For Credit Loss ContractWithCustomerAssetAccumulatedAllowanceForCreditLoss	1579000	USD
CY2020Q3	us-gaap	Long Term Investments And Receivables Net LongTermInvestmentsAndReceivablesNet	33791000	USD
CY2020Q3	nrp	Totalreceivables Gross TotalreceivablesGross	59542000	USD
CY2020Q3	nrp	Cecl Allowancetotal CECLAllowancetotal	3903000	USD
CY2020Q3	nrp	Totalreceivablesnetof Cecl TotalreceivablesnetofCECL	55639000	USD
CY2020Q3	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	-300000	USD
	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	0.0	USD
	us-gaap	Lessee Operating Lease Option To Extend LesseeOperatingLeaseOptionToExtend	five
CY2020Q3	us-gaap	Lessee Operating Lease Renewal Term LesseeOperatingLeaseRenewalTerm	P5Y
CY2020Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	3500000	USD
CY2019Q3	us-gaap	Operating Lease Expense OperatingLeaseExpense	100000	USD
CY2020Q3	us-gaap	Operating Lease Expense OperatingLeaseExpense	100000	USD
	us-gaap	Operating Lease Expense OperatingLeaseExpense	400000	USD
	us-gaap	Operating Lease Expense OperatingLeaseExpense	400000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	121000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	483000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	483000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	483000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	483000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	11597000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	13650000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	10150000	USD
CY2020Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	3500000	USD
CY2020Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P28Y3M
CY2020Q3	us-gaap	Lessee Operating Lease Discount Rate LesseeOperatingLeaseDiscountRate	0.135

Files In Submission

Name	View Source	Status
0001171486-20-000044-index-headers.html	Edgar Link	pending
0001171486-20-000044-index.html	Edgar Link	pending
0001171486-20-000044.txt	Edgar Link	pending
0001171486-20-000044-xbrl.zip	Edgar Link	pending
a2020q3exhibit311.htm	Edgar Link	pending
a2020q3exhibit312.htm	Edgar Link	pending
a2020q3exhibit321.htm	Edgar Link	pending
a2020q3exhibit322.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
nrp-20200930.htm	Edgar Link	pending
nrp-20200930.xsd	Edgar Link	pending
nrp-20200930_cal.xml	Edgar Link	unprocessable
nrp-20200930_def.xml	Edgar Link	unprocessable
nrp-20200930_g1.gif	Edgar Link	pending
nrp-20200930_htm.xml	Edgar Link	completed
nrp-20200930_lab.xml	Edgar Link	unprocessable
nrp-20200930_pre.xml	Edgar Link	unprocessable
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
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R9.htm	Edgar Link	pending
R9999.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$NRP
NATURAL RESOURCE PARTNERS LP Stock $nrp

2020 Q4 Form 10-Q Financial Statement

#000117148620000044 Filed on November 05, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NRP NATURAL RESOURCE PARTNERS LP Stock $nrp

2020 Q4 Form 10-Q Financial Statement

#000117148620000044 Filed on November 05, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NRP
NATURAL RESOURCE PARTNERS LP Stock $nrp