$SUI
SUN COMMUNITIES INC Stock $sui

$sui Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-K Financial Statement

#000091259321000054 Filed on February 18, 2021

Income Statement

Concept	2020 Q4	2020	2019 Q4
Revenue	$384.3M	$1.398B	$301.8M
YoY Change	27.32%	10.63%	10.15%
Cost Of Revenue	$178.2M	$147.1M	$128.1M
YoY Change	39.11%	-1.37%	10.62%
Gross Profit	$206.1M	$1.251B	$173.7M
YoY Change	18.65%	12.23%	9.8%
Gross Profit Margin	53.63%	89.48%	57.55%
Selling, General & Admin	$37.50M	$124.8M	$29.50M
YoY Change	27.12%	16.08%	18.0%
% of Gross Profit	18.2%	9.97%	16.98%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$117.4M	$376.9M	$98.80M
YoY Change	18.83%	14.88%	21.82%
% of Gross Profit	56.96%	30.12%	56.88%
Operating Expenses	$155.1M	$124.8M	$128.4M
YoY Change	20.79%	16.08%	21.13%
Operating Profit	$51.00M	$1.127B	$45.30M
YoY Change	12.58%	11.82%	-13.22%
Interest Expense	-$25.60M	-$126.8M	-$34.50M
YoY Change	-25.8%	-7.98%	3.29%
% of Operating Profit	-50.2%	-11.26%	-76.16%
Other Income/Expense, Net	-$2.200M	-$5.188M	$4.500M
YoY Change	-148.89%	205.0%	-184.91%
Pretax Income	-$8.795M	$135.6M	$7.984M
YoY Change	-210.16%	-3.03%	-52.59%
Income Tax	-$400.0K	-$775.0K	-$100.0K
% Of Pretax Income		-0.57%	-1.25%
Net Earnings	$7.586M	$131.6M	$28.55M
YoY Change	-73.43%	-18.53%	215.82%
Net Earnings / Revenue	1.97%	9.41%	9.46%
Basic Earnings Per Share	$0.07	$1.34	$0.31
Diluted Earnings Per Share	$0.07	$1.34	$0.31
COMMON SHARES
Basic Shares Outstanding	98.28M shares	97.52M shares	90.69M shares
Diluted Shares Outstanding		97.52M shares

Balance Sheet

Concept	2020 Q4	2020	2019 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$202.0M	$98.00M	$116.8M
YoY Change	72.93%	180.0%	17.61%
Cash & Equivalents	$77.30M	$98.00M	$22.10M
Short-Term Investments	$124.7M		$94.73M
Other Short-Term Assets
YoY Change
Inventory	$47.00M	$47.00M	$62.00M
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets	$228.0M	$228.0M	$140.0M
YoY Change	62.86%	62.86%	-44.66%
LONG-TERM ASSETS
Property, Plant & Equipment	$9.796B	$9.796B	$7.289B
YoY Change	34.39%	34.39%	19.14%
Goodwill	$428.8M		$0.00
YoY Change
Intangibles	$305.6M
YoY Change
Long-Term Investments	$59.07M	$125.0M	$37.78M
YoY Change	56.38%	31.58%	23.45%
Other Assets
YoY Change
Total Long-Term Assets	$10.98B	$10.98B	$7.662B
YoY Change	43.29%	43.29%	18.66%
TOTAL ASSETS
Total Short-Term Assets	$228.0M	$228.0M	$140.0M
Total Long-Term Assets	$10.98B	$10.98B	$7.662B
Total Assets	$11.21B	$11.21B	$7.802B
YoY Change	43.64%	43.64%	16.27%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$148.0M	$148.0M	$127.0M
YoY Change	16.54%	16.54%
Accrued Expenses	$50.00M	$50.00M	$24.00M
YoY Change	108.33%	108.33%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$285.0M	$285.0M	$223.0M
YoY Change	27.8%	27.8%	253.97%
LONG-TERM LIABILITIES
Long-Term Debt	$4.761B	$4.761B	$3.438B
YoY Change	38.48%	38.48%	10.05%
Other Long-Term Liabilities	$268.0M	$268.0M	$186.0M
YoY Change	44.09%	44.09%	-36.3%
Total Long-Term Liabilities	$5.029B	$5.029B	$3.624B
YoY Change	38.77%	38.77%	6.09%
TOTAL LIABILITIES
Total Short-Term Liabilities	$285.0M	$285.0M	$223.0M
Total Long-Term Liabilities	$5.029B	$5.029B	$3.624B
Total Liabilities	$5.315B	$5.445B	$3.848B
YoY Change	38.12%	38.51%	10.61%
SHAREHOLDERS EQUITY
Retained Earnings
YoY Change
Common Stock	$1.076M		$932.0K
YoY Change	15.45%		7.87%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$5.525B	$5.761B	$3.820B
YoY Change
Total Liabilities & Shareholders Equity	$11.21B	$11.21B	$7.802B
YoY Change	43.64%	43.64%	16.27%

Cashflow Statement

Concept	2020 Q4	2020	2019 Q4
OPERATING ACTIVITIES
Net Income	$7.586M	$131.6M	$28.55M
YoY Change	-73.43%	-18.53%	215.82%
Depreciation, Depletion And Amortization	$117.4M	$376.9M	$98.80M
YoY Change	18.83%	14.88%	21.82%
Cash From Operating Activities	$84.40M	$543.3M	$78.40M
YoY Change	7.65%	13.96%	26.66%
INVESTING ACTIVITIES
Capital Expenditures	-$1.690B	-$1.946B	-$68.80M
YoY Change	2355.81%	311.68%	371.23%
Acquisitions		$1.946B
YoY Change
Other Investing Activities	-$131.2M	-$540.5M	-$142.4M
YoY Change	-7.87%	0.5%	-18.21%
Cash From Investing Activities	-$1.821B	-$2.487B	-$211.2M
YoY Change	762.12%	146.08%	11.98%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net		$230.3M
YoY Change		-58.34%
Cash From Financing Activities	1.719B	$2.001B	125.8M
YoY Change	1266.3%	295.52%	108.62%
NET CHANGE
Cash From Operating Activities	84.40M	$543.3M	78.40M
Cash From Investing Activities	-1.821B	-$2.487B	-211.2M
Cash From Financing Activities	1.719B	$2.001B	125.8M
Net Change In Cash	-17.60M	$57.81M	-7.000M
YoY Change	151.43%	-310.74%	-89.46%
FREE CASH FLOW
Cash From Operating Activities	$84.40M	$543.3M	$78.40M
Capital Expenditures	-$1.690B	-$1.946B	-$68.80M
Free Cash Flow	$1.774B	$2.489B	$147.2M
YoY Change	1105.16%	162.19%	92.42%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2020	dei	Amendment Flag AmendmentFlag	false
CY2020	dei	Entity File Number EntityFileNumber	1-12616
CY2020	dei	Entity Registrant Name EntityRegistrantName	SUN COMMUNITIES INC
CY2020	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2020	dei	Entity Central Index Key EntityCentralIndexKey	0000912593
CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020	dei	Document Annual Report DocumentAnnualReport	true
CY2020	dei	Document Transition Report DocumentTransitionReport	false
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CY2020Q4	sui	Derecognitionofcollateralizedrecievables Derecognitionofcollateralizedrecievables	0	USD
CY2019Q4	sui	Derecognitionofcollateralizedrecievables Derecognitionofcollateralizedrecievables	0	USD
CY2020	us-gaap	Allowance For Loan And Lease Losses Adjustments Net AllowanceForLoanAndLeaseLossesAdjustmentsNet	0	USD
CY2019	us-gaap	Allowance For Loan And Lease Losses Adjustments Net AllowanceForLoanAndLeaseLossesAdjustmentsNet	0	USD
CY2020	dei	Document Type DocumentType	10-K
CY2020	dei	Document Period End Date DocumentPeriodEndDate	2020-12-31
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	MD
CY2020	dei	Entity File Number EntityFileNumber	1-12616
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	38-2730780
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	27777 Franklin Rd,
CY2020	dei	Entity Address Address Line2 EntityAddressAddressLine2	Suite 200,
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	Southfield,
CY2020	dei	Entity Address State Or Province EntityAddressStateOrProvince	MI
CY2020	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	48034
CY2020	dei	City Area Code CityAreaCode	248
CY2020	dei	Local Phone Number LocalPhoneNumber	208-2500
CY2020	dei	Security12b Title Security12bTitle	Common Stock, $0.01 par value
CY2020	dei	Trading Symbol TradingSymbol	SUI
CY2020	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2020	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2020	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2020	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2020	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2020	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2020	dei	Entity Small Business EntitySmallBusiness	false
CY2020	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
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CY2019	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	4557000	USD
CY2018	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-8234000	USD
CY2020	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	5595000	USD
CY2019	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	0	USD
CY2018	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	0	USD
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-3768000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-1100000	USD
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1781000	USD
CY2020	sui	Losson Remeasurementof Notes Receivable LossonRemeasurementofNotesReceivable	-3275000	USD
CY2019	sui	Losson Remeasurementof Notes Receivable LossonRemeasurementofNotesReceivable	0	USD
CY2018	sui	Losson Remeasurementof Notes Receivable LossonRemeasurementofNotesReceivable	0	USD
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	1740000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	1374000	USD
CY2020	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-8902000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	790000	USD
CY2020	sui	Losson Remeasurementof Investment LossonRemeasurementofInvestment	-1608000	USD
CY2019	sui	Losson Remeasurementof Investment LossonRemeasurementofInvestment	0	USD
CY2018	sui	Losson Remeasurementof Investment LossonRemeasurementofInvestment	0	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	790000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1095000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	595000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1565000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-222000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-507000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	147451000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	177379000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	120158000	USD
CY2020	sui	Preferredreturnto Series A1preferred O Punits PreferredreturntoSeriesA1preferredOPunits	-6935000	USD
CY2019	sui	Preferredreturnto Series A1preferred O Punits PreferredreturntoSeriesA1preferredOPunits	-6058000	USD
CY2018	sui	Preferredreturnto Series A1preferred O Punits PreferredreturntoSeriesA1preferredOPunits	-4486000	USD
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-9768000	USD
CY2018	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-8443000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	131614000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	161553000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	107229000	USD
CY2020	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	0	USD
CY2019	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	-1288000	USD
CY2018	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	-1736000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	131614000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	160265000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	105493000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	97521000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	88460000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	81387000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	97522000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	88915000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	82040000	shares
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.34
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.80
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.29
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.34
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.80
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.29
CY2020	us-gaap	Profit Loss ProfitLoss	147451000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	177379000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	120158000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	4205000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	3328000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-5878000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	151656000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	180707000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	114280000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	8598000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	9923000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	8171000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	143058000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	170784000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	106109000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	147451000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	177379000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	120158000	USD
CY2020	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	15156000	USD
CY2019	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	11085000	USD
CY2018	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	9376000	USD
CY2020	us-gaap	Gain Loss On Disposition Of Real Estate Discontinued Operations GainLossOnDispositionOfRealEstateDiscontinuedOperations	5595000	USD
CY2019	us-gaap	Gain Loss On Disposition Of Real Estate Discontinued Operations GainLossOnDispositionOfRealEstateDiscontinuedOperations	0	USD
CY2018	us-gaap	Gain Loss On Disposition Of Real Estate Discontinued Operations GainLossOnDispositionOfRealEstateDiscontinuedOperations	0	USD
CY2020	us-gaap	Foreign Currency Transaction Gain Loss Unrealized ForeignCurrencyTransactionGainLossUnrealized	8039000	USD
CY2019	us-gaap	Foreign Currency Transaction Gain Loss Unrealized ForeignCurrencyTransactionGainLossUnrealized	4557000	USD
CY2018	us-gaap	Foreign Currency Transaction Gain Loss Unrealized ForeignCurrencyTransactionGainLossUnrealized	-8234000	USD
CY2020	sui	Remeasurement Of Marketable Securities RemeasurementOfMarketableSecurities	6129000	USD
CY2019	sui	Remeasurement Of Marketable Securities RemeasurementOfMarketableSecurities	34240000	USD
CY2018	sui	Remeasurement Of Marketable Securities RemeasurementOfMarketableSecurities	-3639000	USD
CY2020	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain Or Loss BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGainOrLoss	-2962000	USD
CY2019	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain Or Loss BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGainOrLoss	-1503000	USD
CY2018	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain Or Loss BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGainOrLoss	2336000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	23045000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	17482000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	15066000	USD
CY2020	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	371878000	USD
CY2019	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	313966000	USD
CY2018	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	274432000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1565000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-222000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-507000	USD
CY2020	us-gaap	Amortization Of Below Market Lease AmortizationOfBelowMarketLease	7347000	USD
CY2019	us-gaap	Amortization Of Below Market Lease AmortizationOfBelowMarketLease	7442000	USD
CY2018	us-gaap	Amortization Of Below Market Lease AmortizationOfBelowMarketLease	7399000	USD
CY2020	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	-1467000	USD
CY2019	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	-4962000	USD
CY2018	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	-6353000	USD
CY2020	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	3090000	USD
CY2019	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	2988000	USD
CY2018	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	3233000	USD
CY2020	sui	Amortizationof Ground Lease AmortizationofGroundLease	752000	USD
CY2019	sui	Amortizationof Ground Lease AmortizationofGroundLease	752000	USD
CY2018	sui	Amortizationof Ground Lease AmortizationofGroundLease	1638000	USD
CY2020	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-5209000	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-16505000	USD
CY2018	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-1190000	USD
CY2020	sui	Gain Loss On Remeasurement Of Note Receivable GainLossOnRemeasurementOfNoteReceivable	-3275000	USD
CY2019	sui	Gain Loss On Remeasurement Of Note Receivable GainLossOnRemeasurementOfNoteReceivable	0	USD
CY2018	sui	Gain Loss On Remeasurement Of Note Receivable GainLossOnRemeasurementOfNoteReceivable	0	USD
CY2020	sui	Gain Loss On Remeasurement Of Investment In Nonconsolidated Entities GainLossOnRemeasurementOfInvestmentInNonconsolidatedEntities	-1608000	USD
CY2019	sui	Gain Loss On Remeasurement Of Investment In Nonconsolidated Entities GainLossOnRemeasurementOfInvestmentInNonconsolidatedEntities	0	USD
CY2018	sui	Gain Loss On Remeasurement Of Investment In Nonconsolidated Entities GainLossOnRemeasurementOfInvestmentInNonconsolidatedEntities	0	USD
CY2020	us-gaap	Payments Of Distributions To Affiliates PaymentsOfDistributionsToAffiliates	1740000	USD
CY2019	us-gaap	Payments Of Distributions To Affiliates PaymentsOfDistributionsToAffiliates	1374000	USD
CY2018	us-gaap	Payments Of Distributions To Affiliates PaymentsOfDistributionsToAffiliates	790000	USD
CY2020	sui	Distributions From Affiliate DistributionsFromAffiliate	-4088000	USD
CY2019	sui	Distributions From Affiliate DistributionsFromAffiliate	-3049000	USD
CY2018	sui	Distributions From Affiliate DistributionsFromAffiliate	0	USD
CY2020	us-gaap	Increase Decrease In Notes Receivables IncreaseDecreaseInNotesReceivables	176000	USD
CY2019	us-gaap	Increase Decrease In Notes Receivables IncreaseDecreaseInNotesReceivables	-2988000	USD
CY2018	us-gaap	Increase Decrease In Notes Receivables IncreaseDecreaseInNotesReceivables	2299000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-10853000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	44322000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	39514000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	21951000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	48326000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	4098000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	548948000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	476734000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	363114000	USD
CY2020	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	538523000	USD
CY2019	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	569261000	USD
CY2018	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	389399000	USD
CY2020	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	1946015000	USD
CY2019	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	472681000	USD
CY2018	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	320268000	USD
CY2020	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	55395000	USD
CY2019	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	61337000	USD
CY2018	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	55855000	USD
CY2020	us-gaap	Proceeds From Real Estate And Real Estate Joint Ventures ProceedsFromRealEstateAndRealEstateJointVentures	12612000	USD
CY2019	us-gaap	Proceeds From Real Estate And Real Estate Joint Ventures ProceedsFromRealEstateAndRealEstateJointVentures	0	USD
CY2018	us-gaap	Proceeds From Real Estate And Real Estate Joint Ventures ProceedsFromRealEstateAndRealEstateJointVentures	0	USD
CY2020	sui	Issuanceofnotesandotherreceivables Issuanceofnotesandotherreceivables	45650000	USD
CY2019	sui	Issuanceofnotesandotherreceivables Issuanceofnotesandotherreceivables	18122000	USD
CY2018	sui	Issuanceofnotesandotherreceivables Issuanceofnotesandotherreceivables	216000	USD
CY2020	sui	Repaymentof Notesand Other Receivables RepaymentofNotesandOtherReceivables	12173000	USD
CY2019	sui	Repaymentof Notesand Other Receivables RepaymentofNotesandOtherReceivables	4542000	USD
CY2018	sui	Repaymentof Notesand Other Receivables RepaymentofNotesandOtherReceivables	4312000	USD
CY2020	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	47241000	USD
CY2019	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	60742000	USD
CY2018	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	84997000	USD
CY2020	us-gaap	Proceeds From Contributions From Affiliates ProceedsFromContributionsFromAffiliates	10732000	USD
CY2019	us-gaap	Proceeds From Contributions From Affiliates ProceedsFromContributionsFromAffiliates	44470000	USD
CY2018	us-gaap	Proceeds From Contributions From Affiliates ProceedsFromContributionsFromAffiliates	970000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2486517000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1010457000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-733743000	USD
CY2020	us-gaap	Proceeds From Issuance Or Sale Of Equity ProceedsFromIssuanceOrSaleOfEquity	1850611000	USD
CY2019	us-gaap	Proceeds From Issuance Or Sale Of Equity ProceedsFromIssuanceOrSaleOfEquity	440782000	USD
CY2018	us-gaap	Proceeds From Issuance Or Sale Of Equity ProceedsFromIssuanceOrSaleOfEquity	623540000	USD
CY2020	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	1585904000	USD
CY2019	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	3881543000	USD
CY2018	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	1542677000	USD
CY2020	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	1361538000	USD
CY2019	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	3883950000	USD
CY2018	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	1456486000	USD
CY2020	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	491784000	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	923721000	USD
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	250000000	USD
CY2020	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	230330000	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	552868000	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	298754000	USD
CY2020	sui	Prepayment Penalty Debt PrepaymentPenaltyDebt	6226000	USD
CY2019	sui	Prepayment Penalty Debt PrepaymentPenaltyDebt	18838000	USD
CY2018	sui	Prepayment Penalty Debt PrepaymentPenaltyDebt	2024000	USD
CY2020	sui	Distributions To Stockholders Op Unit Holders And Preferred Op Unit Holders DistributionsToStockholdersOpUnitHoldersAndPreferredOpUnitHolders	313137000	USD
CY2019	sui	Distributions To Stockholders Op Unit Holders And Preferred Op Unit Holders DistributionsToStockholdersOpUnitHoldersAndPreferredOpUnitHolders	276697000	USD
CY2018	sui	Distributions To Stockholders Op Unit Holders And Preferred Op Unit Holders DistributionsToStockholdersOpUnitHoldersAndPreferredOpUnitHolders	242813000	USD
CY2020	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	14224000	USD
CY2019	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	6756000	USD
CY2018	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	2130000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	2000844000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	505880000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	409905000	USD
CY2020	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	189000	USD
CY2019	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	411000	USD
CY2018	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-523000	USD
CY2020	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	63464000	USD
CY2019	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-27432000	USD
CY2018	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	38753000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	34830000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	62262000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	23509000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	98294000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	34830000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	62262000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	135986000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	134990000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	126153000	USD
CY2020	us-gaap	Distributions On Mandatorily Redeemable Securities DistributionsOnMandatorilyRedeemableSecurities	4177000	USD
CY2019	us-gaap	Distributions On Mandatorily Redeemable Securities DistributionsOnMandatorilyRedeemableSecurities	4698000	USD
CY2018	us-gaap	Distributions On Mandatorily Redeemable Securities DistributionsOnMandatorilyRedeemableSecurities	2551000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1115000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	948000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	461000	USD
CY2020	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	0	USD
CY2019	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	107731000	USD
CY2018	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	21451000	USD
CY2020	us-gaap	Dividends Dividends	15280000	USD
CY2019	us-gaap	Dividends Dividends	8452000	USD
CY2018	us-gaap	Dividends Dividends	7889000	USD
CY2020	us-gaap	Conversion Of Stock Amount Converted1 ConversionOfStockAmountConverted1	1022000	USD
CY2019	us-gaap	Conversion Of Stock Amount Converted1 ConversionOfStockAmountConverted1	11310000	USD
CY2018	us-gaap	Conversion Of Stock Amount Converted1 ConversionOfStockAmountConverted1	1515000	USD
CY2020	us-gaap	Increase Decrease In Assets Held For Sale IncreaseDecreaseInAssetsHeldForSale	32145000	USD
CY2019	us-gaap	Increase Decrease In Assets Held For Sale IncreaseDecreaseInAssetsHeldForSale	0	USD
CY2018	us-gaap	Increase Decrease In Assets Held For Sale IncreaseDecreaseInAssetsHeldForSale	0	USD
CY2020	sui	Conversion Of Series A Four Preferred Stock ConversionOfSeriesAFourPreferredStock	0	USD
CY2019	sui	Conversion Of Series A Four Preferred Stock ConversionOfSeriesAFourPreferredStock	31739000	USD
CY2018	sui	Conversion Of Series A Four Preferred Stock ConversionOfSeriesAFourPreferredStock	675000	USD
CY2020	sui	Settlementofmembershipinterest Settlementofmembershipinterest	37565000	USD
CY2019	sui	Settlementofmembershipinterest Settlementofmembershipinterest	313391000	USD
CY2018	sui	Settlementofmembershipinterest Settlementofmembershipinterest	0	USD
CY2020	sui	Land Capital Lease LandCapitalLease	0	USD
CY2019	sui	Land Capital Lease LandCapitalLease	0	USD
CY2018	sui	Land Capital Lease LandCapitalLease	21976000	USD
CY2020	sui	Stock Issued During Period Value New Issues Series A3 Preferred Op Units StockIssuedDuringPeriodValueNewIssuesSeriesA3PreferredOPUnits	837800000	USD
CY2019	sui	Stock Issued During Period Value New Issues Series A3 Preferred Op Units StockIssuedDuringPeriodValueNewIssuesSeriesA3PreferredOPUnits	61900000	USD
CY2018	sui	Stock Issued During Period Value New Issues Series A3 Preferred Op Units StockIssuedDuringPeriodValueNewIssuesSeriesA3PreferredOPUnits	3120000	USD
CY2017Q4	us-gaap	Temporary Equity Carrying Amount Including Portion Attributable To Noncontrolling Interests TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests	43066000	USD
CY2018	sui	Temporary Equity Acquisition Of Equity Interests TemporaryEquityAcquisitionOfEquityInterests	21976000	USD
CY2018	us-gaap	Temporary Equity Net Income TemporaryEquityNetIncome	241000	USD
CY2018	sui	Temporary Equity Dividends TemporaryEquityDividends	-674000	USD
CY2018Q4	us-gaap	Temporary Equity Carrying Amount Including Portion Attributable To Noncontrolling Interests TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests	63592000	USD
CY2019	sui	Temporary Equity Acquisition Of Equity Interests TemporaryEquityAcquisitionOfEquityInterests	4451000	USD
CY2019	us-gaap	Temporary Equity Net Income TemporaryEquityNetIncome	1599000	USD
CY2019	sui	Temporary Equity Dividends TemporaryEquityDividends	-2177000	USD
CY2019Q4	us-gaap	Temporary Equity Carrying Amount Including Portion Attributable To Noncontrolling Interests TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests	78004000	USD
CY2020	sui	Temporary Equity Acquisition Of Equity Interests TemporaryEquityAcquisitionOfEquityInterests	1485000	USD
CY2020	us-gaap	Temporary Equity Net Income TemporaryEquityNetIncome	519000	USD
CY2020	sui	Temporary Equity Dividends TemporaryEquityDividends	-2509000	USD
CY2020Q4	us-gaap	Temporary Equity Carrying Amount Including Portion Attributable To Noncontrolling Interests TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests	264379000	USD
CY2020Q4	us-gaap	Number Of States In Which Entity Operates NumberOfStatesInWhichEntityOperates	39	properties
CY2020Q4	us-gaap	Number Of Units In Real Estate Property NumberOfUnitsInRealEstateProperty	188176	sites
CY2020	us-gaap	Use Of Estimates UseOfEstimates	<div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Use of Estimates</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires management to make estimates and assumptions related to the reported amounts included in our Consolidated Financial Statements and accompanying footnotes thereto. Actual results could differ from those estimates.</span></div>
CY2020	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	2	segment
CY2020Q4	us-gaap	Debt Issuance Costs Line Of Credit Arrangements Net DebtIssuanceCostsLineOfCreditArrangementsNet	11700000	USD
CY2019Q4	us-gaap	Debt Issuance Costs Line Of Credit Arrangements Net DebtIssuanceCostsLineOfCreditArrangementsNet	4500000	USD
CY2020	sui	Deferred Financing Costsand Discountand Premium Costs DeferredFinancingCostsandDiscountandPremiumCosts	13900000	USD
CY2019	sui	Deferred Financing Costsand Discountand Premium Costs DeferredFinancingCostsandDiscountandPremiumCosts	7900000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	83000000.0	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	22100000	USD
CY2020Q4	us-gaap	Cash Uninsured Amount CashUninsuredAmount	74500000	USD
CY2019Q4	us-gaap	Cash Uninsured Amount CashUninsuredAmount	22900000	USD
CY2020Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	15300000	USD
CY2019Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	12700000	USD
CY2020Q4	us-gaap	Marketable Securities MarketableSecurities	124700000	USD
CY2019Q4	us-gaap	Marketable Securities MarketableSecurities	94700000	USD
CY2020	sui	Cost Method Investment Policy Maximum Percentage Of Ownership CostMethodInvestmentPolicyMaximumPercentageOfOwnership	0.050
CY2021Q1	us-gaap	Contract With Customer Asset Reclassified To Receivable ContractWithCustomerAssetReclassifiedToReceivable	23600000	USD
CY2020	us-gaap	Contract With Customer Asset Reclassified To Receivable ContractWithCustomerAssetReclassifiedToReceivable	20900000	USD
CY2020	us-gaap	Advertising Expense AdvertisingExpense	8300000	USD
CY2019	us-gaap	Advertising Expense AdvertisingExpense	6700000	USD
CY2018	us-gaap	Advertising Expense AdvertisingExpense	6200000	USD
CY2020	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	8000000.0	USD
CY2019	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	4600000	USD
CY2018	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-8200000	USD
CY2018	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	816830000	USD
CY2018	sui	Revenue From Home Sales RevenueFromHomeSales	166031000	USD
CY2018	sui	Rental Home Revenue RentalHomeRevenue	53657000	USD
CY2018	sui	Ancillary Revenue AncillaryRevenue	63250000	USD
CY2018	us-gaap	Interest Income Operating InterestIncomeOperating	20852000	USD
CY2018	sui	Brokeragecommissionsandotherincomenet Brokeragecommissionsandotherincomenet	6205000	USD
CY2020	us-gaap	Revenues Revenues	1398347000	USD
CY2019	us-gaap	Revenues Revenues	1264037000	USD
CY2018	us-gaap	Revenues Revenues	1126825000	USD
CY2020Q4	us-gaap	Number Of Units In Real Estate Property NumberOfUnitsInRealEstateProperty	6919	site
CY2020Q4	sui	Number Of Marinas Owned NumberOfMarinasOwned	99	segment
CY2020Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Property Plant And Equipment BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment	495893000	USD
CY2020Q4	sui	Business Combination Recognized Identifiable Assets Acquiredand Liabilities Assumed Current Assets Liabilities Inventory BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentAssetsLiabilitiesInventory	3056000	USD
CY2020Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Intangibles BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles	6619000	USD
CY2020Q4	sui	Business Combination Recognized Identifiable Assets Acquiredand Liabilities Assumed Other Liabilities BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherLiabilities	13311000	USD
CY2020Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Net BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet	492257000	USD
CY2020	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	428117000	USD
CY2020Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Noncurrent Liabilities Long Term Debt BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt	8800000	USD
CY2020	us-gaap	Business Combination Consideration Transferred Equity Interests Issued And Issuable BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable	55340000	USD
CY2020	us-gaap	Business Combination Consideration Transferred1 BusinessCombinationConsiderationTransferred1	492257000	USD
CY2020	us-gaap	Business Combination Integration Related Costs BusinessCombinationIntegrationRelatedCosts	23000000.0	USD
CY2020	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	47276000	USD
CY2020	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	-8524000	USD
CY2020	sui	Number Of Land Parcels Acquired NumberOfLandParcelsAcquired	8	landParcel
CY2020	us-gaap	Payments To Acquire Land PaymentsToAcquireLand	9700000	USD
CY2020	sui	Number Of Land Parcels Acquired Adjacent To Existing Communities NumberOfLandParcelsAcquiredAdjacentToExistingCommunities	7	landParcel
CY2020Q3	sui	Number Of Housing Sites Sold NumberOfHousingSitesSold	226	site
CY2019Q4	us-gaap	Number Of Units In Real Estate Property NumberOfUnitsInRealEstateProperty	10390	site
CY2019Q4	sui	Numberof Unitsin Real Estate Property Development Sites NumberofUnitsinRealEstatePropertyDevelopmentSites	926	development_site
CY2020	us-gaap	Business Acquisition Equity Interests Issued Or Issuable Number Of Shares Issued BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued	1972876	shares
CY2020	sui	Numberof Mh Sites NumberofMHSites	201	site
CY2020	sui	Numberof Rv Sites NumberofRVSites	301	site
CY2020	sui	Numberof Motor Home Communities NumberofMotorHomeCommunities	2
CY2019Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Property Plant And Equipment BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment	825266000	USD
CY2019Q4	sui	Business Combination Recognized Identifiable Assets Acquiredand Liabilities Assumed Current Assets Liabilities Inventory BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentAssetsLiabilitiesInventory	6163000	USD
CY2019Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Noncurrent Liabilities Long Term Debt BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt	22302000	USD
CY2019Q4	sui	Business Combination Recognized Identifiable Assets Acquiredand Liabilities Assumed Other Liabilities BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherLiabilities	-49000	USD
CY2019Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Net BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet	853682000	USD
CY2019	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	426461000	USD
CY2019	sui	Business Combination Consideration Transferred Other Liabilities Incurred Net BusinessCombinationConsiderationTransferredOtherLiabilitiesIncurredNet	61900000	USD
CY2019	sui	Real Estate Acquisition Costs RealEstateAcquisitionCosts	19300000	USD
CY2020Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Land BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLand	7700000	USD
CY2019Q1	sui	Purchaseof Tangible Property PurchaseofTangibleProperty	300000	USD
CY2020Q4	us-gaap	Receivable With Imputed Interest Net Amount ReceivableWithImputedInterestNetAmount	85900000	USD
CY2020Q4	us-gaap	Receivable With Imputed Interest Net Amount ReceivableWithImputedInterestNetAmount	85866000	USD
CY2019Q4	us-gaap	Receivable With Imputed Interest Net Amount ReceivableWithImputedInterestNetAmount	95580000	USD
CY2020Q4	sui	Undrawn Funds On Loans UndrawnFundsOnLoans	17000000.0	USD
CY2020Q4	sui	Other Receivables For Rent Water Sewer Usage OtherReceivablesForRentWaterSewerUsage	7100000	USD
CY2020Q4	sui	Allowance For Rent Water Sewer Usage Receivables AllowanceForRentWaterSewerUsageReceivables	7200000	USD
CY2020Q4	sui	Home Sale Proceeds HomeSaleProceeds	23600000	USD
CY2020Q4	sui	Insurance Receivables InsuranceReceivables	13600000	USD
CY2020Q4	sui	Other Receivables Storage And Lease Payments Marina OtherReceivablesStorageAndLeasePaymentsMarina	19200000	USD
CY2019Q4	sui	Other Receivables For Rent Water Sewer Usage OtherReceivablesForRentWaterSewerUsage	7800000	USD
CY2019Q4	sui	Allowance For Rent Water Sewer Usage Receivables AllowanceForRentWaterSewerUsageReceivables	2200000	USD
CY2019	us-gaap	Contract With Customer Asset Reclassified To Receivable ContractWithCustomerAssetReclassifiedToReceivable	20900000	USD
CY2019Q4	sui	Insurance Receivables InsuranceReceivables	9900000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	428833000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	0	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	832720000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	98276000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	144256000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	77308000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	21379000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	15730000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	13420000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	43719000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	32041000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	28092000	USD
CY2020Q4	sui	Variable Interest Entityasa Percentageof Consolidated Liabilities VariableInterestEntityasaPercentageofConsolidatedLiabilities	0.025	Rate
CY2021Q1	sui	Vi Easa Percentageof Total Equity VIEasaPercentageofTotalEquity	0.010
CY2019Q4	us-gaap	Line Of Credit LineOfCredit	183898000	USD
CY2020	sui	Debtweightedaveragetomaturitylength Debtweightedaveragetomaturitylength	P9Y4M24D
CY2019	sui	Debtweightedaveragetomaturitylength Debtweightedaveragetomaturitylength	P11Y1M6D
CY2020Q4	us-gaap	Debt Weighted Average Interest Rate DebtWeightedAverageInterestRate	0.03370	Rate
CY2019Q4	us-gaap	Debt Weighted Average Interest Rate DebtWeightedAverageInterestRate	0.04026	Rate
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	4770970	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	69585	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	158313	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	311760	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	1585424	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	106228	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	2539660	USD
CY2020Q1	us-gaap	Secured Debt SecuredDebt	3400000000	USD
CY2018Q2	sui	Financial Instruments Subjectto Mandatory Redemption Rate Of Return FinancialInstrumentsSubjecttoMandatoryRedemptionRateOfReturn	0.060
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	25282000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	23984000	USD
CY2020Q4	us-gaap	Equity Method Investments EquityMethodInvestments	59074000	USD
CY2019Q4	us-gaap	Equity Method Investments EquityMethodInvestments	37776000	USD
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	1740000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	1374000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	790000	USD
CY2020Q4	sui	Variable Interest Entityasa Percentageof Consolidated Assets VariableInterestEntityasaPercentageofConsolidatedAssets	0.041	Rate
CY2019Q4	sui	Variable Interest Entityasa Percentageof Consolidated Assets VariableInterestEntityasaPercentageofConsolidatedAssets	0.047	Rate
CY2020Q4	sui	Variable Interest Entityasa Percentageof Consolidated Liabilities VariableInterestEntityasaPercentageofConsolidatedLiabilities	0.020
CY2020Q3	us-gaap	Sale Of Stock Number Of Shares Issued In Transaction SaleOfStockNumberOfSharesIssuedInTransaction	9200000	shares
CY2020Q4	us-gaap	Sale Of Stock Price Per Share SaleOfStockPricePerShare	139.50
CY2020Q2	us-gaap	Sale Of Stock Number Of Shares Issued In Transaction SaleOfStockNumberOfSharesIssuedInTransaction	4968000	shares
CY2020Q2	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	633100000	USD
CY2020Q2	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	3737500	shares
CY2020Q2	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	452100000	USD
CY2020Q3	sui	Aggregate Valueof Sharestobe Issuedin Accordanceto Sales Agreement AggregateValueofSharestobeIssuedinAccordancetoSalesAgreement	450000000.0	USD
CY2020	sui	Commission Maximum Percentageof Gross Sales Price Per Share Accordingto Sales Agreement CommissionMaximumPercentageofGrossSalesPricePerShareAccordingtoSalesAgreement	0.020
	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	163800000	USD
	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	398516	shares
CY2020Q3	sui	Shares Issued Weighted Average Price Per Share SharesIssuedWeightedAveragePricePerShare	100.19
	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	39400000	USD
	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	1008699	shares
CY2019Q4	sui	Shares Issued Weighted Average Price Per Share SharesIssuedWeightedAveragePricePerShare	92.98
	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	92600000	USD
CY2020Q2	sui	Temporary Equity Dividends For Term Two Percentage TemporaryEquityDividendsForTermTwoPercentage	0.030
CY2019Q3	sui	Variable Interest Entity Equity Interests Issued VariableInterestEntityEquityInterestsIssued	2400000	USD
CY2020	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	458541	shares
CY2020	sui	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Percent Expected To Vest SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsPercentExpectedToVest	0.756
CY2019	sui	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Percent Expected To Vest SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsPercentExpectedToVest	0.751
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	22700000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	17500000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	15100000	USD
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	19000000.0	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	15300000	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	11700000	USD
CY2020Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	52600000	USD
CY2020Q1	sui	Employee Service Sharebased Compensation Nonvested Awards Expected Compensation Cost To Be Recognized In Next Twelve Months EmployeeServiceSharebasedCompensationNonvestedAwardsExpectedCompensationCostToBeRecognizedInNextTwelveMonths	19800	USD
CY2020Q1	sui	Employee Service Sharebased Compensation Nonvested Awards Expected Compensation Cost To Be Recognized In Two Years EmployeeServiceSharebasedCompensationNonvestedAwardsExpectedCompensationCostToBeRecognizedInTwoYears	15700	USD
CY2020Q1	sui	Employee Service Sharebased Compensation Nonvested Awards Expected Compensation Cost To Be Recognized In Three Years EmployeeServiceSharebasedCompensationNonvestedAwardsExpectedCompensationCostToBeRecognizedInThreeYears	8800	USD
CY2020Q1	sui	Employee Service Sharebased Compensation Nonvested Awards Expected Compensation Cost To Be Recognized After Three Years EmployeeServiceSharebasedCompensationNonvestedAwardsExpectedCompensationCostToBeRecognizedAfterThreeYears	8300	USD
CY2020Q4	sui	Transient Rv Revenue TransientRVRevenue	134700000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	147451000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	177379000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	120158000	USD
CY2020	sui	Preferredreturnto Series A1preferred O Punits PreferredreturntoSeriesA1preferredOPunits	-6935000	USD
CY2019	sui	Preferredreturnto Series A1preferred O Punits PreferredreturntoSeriesA1preferredOPunits	-6058000	USD
CY2018	sui	Preferredreturnto Series A1preferred O Punits PreferredreturntoSeriesA1preferredOPunits	-4486000	USD
CY2020	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	-8902000	USD
CY2019	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	-9768000	USD
CY2018	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	-8443000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	131614000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	161553000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	107229000	USD
CY2020	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	0	USD
CY2019	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	-1288000	USD
CY2018	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	-1736000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	131614000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	160265000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	105493000	USD
CY2020Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	9715791000	USD
CY2019Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	7232620000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	98294000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	34830000	USD
CY2020Q4	us-gaap	Marketable Securities MarketableSecurities	124726000	USD
CY2019Q4	us-gaap	Marketable Securities MarketableSecurities	94727000	USD
CY2020Q4	us-gaap	Inventory Finished Homes InventoryFinishedHomes	46643000	USD
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	2.96
CY2019Q4	us-gaap	Inventory Finished Homes InventoryFinishedHomes	62061000	USD
CY2020Q4	us-gaap	Accounts And Notes Receivable Net AccountsAndNotesReceivableNet	221650000	USD
CY2019Q4	us-gaap	Accounts And Notes Receivable Net AccountsAndNotesReceivableNet	157926000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	428833000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	0	USD
CY2020Q4	us-gaap	Other Intangible Assets Net OtherIntangibleAssetsNet	305611000	USD
CY2019Q4	us-gaap	Other Intangible Assets Net OtherIntangibleAssetsNet	66948000	USD
CY2020Q4	us-gaap	Other Assets OtherAssets	265038000	USD
CY2019Q4	us-gaap	Other Assets OtherAssets	152948000	USD
CY2020Q4	us-gaap	Assets Assets	11206586000	USD
CY2019Q4	us-gaap	Assets Assets	7802060000	USD
CY2020Q1	sui	Minimum Percent Of Income From Qualifying Sources To Allow For Real Estate Investment Trust Classification MinimumPercentOfIncomeFromQualifyingSourcesToAllowForRealEstateInvestmentTrustClassification	0.950
CY2020Q1	sui	Required Minimum Percent Of Taxable Income Distributed To Stock Holders RequiredMinimumPercentOfTaxableIncomeDistributedToStockHolders	0.900
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	3.12
CY2020	sui	Percent Of Total Dividends Paid PercentOfTotalDividendsPaid	1.000
CY2019	sui	Percent Of Total Dividends Paid PercentOfTotalDividendsPaid	1.000
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	2.80
CY2018	sui	Percent Of Total Dividends Paid PercentOfTotalDividendsPaid	1.000
CY2020	sui	Ordinary Dividend Taxable Percent OrdinaryDividendTaxablePercent	99.0364
CY2020	sui	Ordinary Tax Dividend Percent Qualified Dividend OrdinaryTaxDividendPercentQualifiedDividend	0.009636
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-835000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-3000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-102000	USD
CY2020Q4	sui	Deferred Tax Assets Federal DeferredTaxAssetsFederal	-613000	USD
CY2019Q4	sui	Deferred Tax Assets Federal DeferredTaxAssetsFederal	0	USD
CY2018Q4	sui	Deferred Tax Assets Federal DeferredTaxAssetsFederal	0	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1539000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	919000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	701000	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-2000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	0	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	11000	USD
CY2020	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	85000	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	179000	USD
CY2018	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	-4000	USD
CY2020	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-949000	USD
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-222000	USD
CY2018	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-518000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-775000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	873000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	88000	USD
CY2020	sui	Income Loss Attributableto Taxable Subsidiaries IncomeLossAttributabletoTaxableSubsidiaries	8393000	USD
CY2019	sui	Income Loss Attributableto Taxable Subsidiaries IncomeLossAttributabletoTaxableSubsidiaries	-4122000	USD
CY2018	sui	Income Loss Attributableto Taxable Subsidiaries IncomeLossAttributabletoTaxableSubsidiaries	-7299000	USD
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-1763000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-866000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-1534000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	721000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	-0.086
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	42000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	-0.010
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	0	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0
CY2020	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-236000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0.028
CY2019	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-73000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0.018
CY2018	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-112000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0.015
CY2020	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	1326000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.158
CY2019	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	526000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.127
CY2018	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	2885000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.395
CY2020	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-1638000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	0.195
CY2019	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	692000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	-0.168
CY2018	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-1576000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	0.216
CY2020	sui	Income Tax Expense Benefit Taxable Subsidiaries Amount IncomeTaxExpenseBenefitTaxableSubsidiariesAmount	-1590000	USD
CY2020	sui	Income Tax Expense Benefit Taxable Subsidiaries Percent IncomeTaxExpenseBenefitTaxableSubsidiariesPercent	0.189
CY2019	sui	Income Tax Expense Benefit Taxable Subsidiaries Amount IncomeTaxExpenseBenefitTaxableSubsidiariesAmount	321000	USD
CY2019	sui	Income Tax Expense Benefit Taxable Subsidiaries Percent IncomeTaxExpenseBenefitTaxableSubsidiariesPercent	-0.077
CY2018	sui	Income Tax Expense Benefit Taxable Subsidiaries Amount IncomeTaxExpenseBenefitTaxableSubsidiariesAmount	-337000	USD
CY2018	sui	Income Tax Expense Benefit Taxable Subsidiaries Percent IncomeTaxExpenseBenefitTaxableSubsidiariesPercent	0.046
CY2020	sui	Income Tax Expense Benefit Other State Tax Flow Through Subsidiaries IncomeTaxExpenseBenefitOtherStateTaxFlowThroughSubsidiaries	815000	USD
CY2019	sui	Income Tax Expense Benefit Other State Tax Flow Through Subsidiaries IncomeTaxExpenseBenefitOtherStateTaxFlowThroughSubsidiaries	552000	USD
CY2018	sui	Income Tax Expense Benefit Other State Tax Flow Through Subsidiaries IncomeTaxExpenseBenefitOtherStateTaxFlowThroughSubsidiaries	425000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-775000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	873000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	88000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	19504000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	18009000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	18071000	USD
CY2020Q4	sui	Deferred Tax Assets Real Estate DeferredTaxAssetsRealEstate	32968000	USD
CY2019Q4	sui	Deferred Tax Assets Real Estate DeferredTaxAssetsRealEstate	28787000	USD
CY2018Q4	sui	Deferred Tax Assets Real Estate DeferredTaxAssetsRealEstate	28140000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	-609000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	395000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	784000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	51863000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	47191000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	46995000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	-44017000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	-45342000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	-44817000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	7846000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	1849000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	2178000	USD
CY2020Q4	sui	Deferred Tax Liability Basis Difference Domestic Assets DeferredTaxLiabilityBasisDifferenceDomesticAssets	5743000	USD
CY2019Q4	sui	Deferred Tax Liability Basis Difference Domestic Assets DeferredTaxLiabilityBasisDifferenceDomesticAssets	0	USD
CY2018Q4	sui	Deferred Tax Liability Basis Difference Domestic Assets DeferredTaxLiabilityBasisDifferenceDomesticAssets	0	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	-22653000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	-22813000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	-22406000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	105493000	USD
	sui	Incomeloss Attributableto Common Stockholders Allocable To Non Vested Restricted Shares IncomelossAttributabletoCommonStockholdersAllocableToNonVestedRestrictedShares	795000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	-28396000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	-22813000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	-22406000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	-20550000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	-20964000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	-20228000	USD
CY2020Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	80200000	USD
CY2020Q4	sui	Operating Loss Carryforwards After Tax OperatingLossCarryforwardsAfterTax	16700000	USD
CY2020Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
CY2020	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	0	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1500000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	900000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	700000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	131614000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	160265000	USD
	sui	Incomeloss Attributableto Common Stockholders Allocable To Non Vested Restricted Shares IncomelossAttributabletoCommonStockholdersAllocableToNonVestedRestrictedShares	1170000	USD
CY2018	sui	Incomeloss Attributableto Common Stockholders Allocable To Non Vested Restricted Shares IncomelossAttributabletoCommonStockholdersAllocableToNonVestedRestrictedShares	831000	USD
	sui	Netincomeattributabletocommonshareholdersafterrestrictedstockallocation Netincomeattributabletocommonshareholdersafterrestrictedstockallocation	130819000	USD
	sui	Netincomeattributabletocommonshareholdersafterrestrictedstockallocation Netincomeattributabletocommonshareholdersafterrestrictedstockallocation	159095000	USD
CY2018	sui	Netincomeattributabletocommonshareholdersafterrestrictedstockallocation Netincomeattributabletocommonshareholdersafterrestrictedstockallocation	104662000	USD
	us-gaap	Amount Of Dilutive Securities Stock Options And Restrictive Stock Units AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits	0	USD
	us-gaap	Amount Of Dilutive Securities Stock Options And Restrictive Stock Units AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits	1170000	USD
CY2018	us-gaap	Amount Of Dilutive Securities Stock Options And Restrictive Stock Units AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits	831000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	130819000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	160265000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	105493000	USD
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	97521000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	88460000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	81387000	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	1000	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	1000	shares
CY2018	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	2000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	454000	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	651000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	97522000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	88915000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	82040000	shares
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.34
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.80
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.29
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.34
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.80
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.29
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	6945000	shares
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	4852000	shares
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	6169000	shares
CY2020Q1	us-gaap	Revenues Revenues	310302000	USD
CY2020Q2	us-gaap	Revenues Revenues	303266000	USD
CY2020Q3	us-gaap	Revenues Revenues	400514000	USD
CY2020Q4	us-gaap	Revenues Revenues	384265000	USD
CY2019Q1	us-gaap	Revenues Revenues	287330000	USD
CY2019Q2	us-gaap	Revenues Revenues	312445000	USD
CY2019Q3	us-gaap	Revenues Revenues	362443000	USD
CY2019Q4	us-gaap	Revenues Revenues	301819000	USD
CY2020Q1	us-gaap	Costs And Expenses CostsAndExpenses	274781000	USD
CY2020Q2	us-gaap	Costs And Expenses CostsAndExpenses	275715000	USD
CY2020Q3	us-gaap	Costs And Expenses CostsAndExpenses	320967000	USD
CY2020Q4	us-gaap	Costs And Expenses CostsAndExpenses	393060000	USD
CY2019Q1	us-gaap	Costs And Expenses CostsAndExpenses	252759000	USD
CY2019Q2	us-gaap	Costs And Expenses CostsAndExpenses	272273000	USD
CY2019Q3	us-gaap	Costs And Expenses CostsAndExpenses	305989000	USD
CY2019Q4	us-gaap	Costs And Expenses CostsAndExpenses	293835000	USD
CY2020Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	35521000	USD
CY2020Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	27551000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	79547000	USD
CY2020Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-8795000	USD
CY2019Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	34571000	USD
CY2019Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	40172000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	56454000	USD
CY2019Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	7984000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	-16086000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	58910000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	81204000	USD
CY2020Q4	us-gaap	Net Income Loss NetIncomeLoss	7586000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	34331000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	40385000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	57002000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	28547000	USD
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.17
CY2020Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.61
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.83
CY2020Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.07
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.40
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.46
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.63
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.31
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.17
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.61
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.83
CY2020Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.07
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.40
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.46
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.63
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.31
CY2021Q1	us-gaap	Notes Receivable Fair Value Disclosure NotesReceivableFairValueDisclosure	52638000	USD
CY2021Q1	us-gaap	Notes Receivable Fair Value Disclosure NotesReceivableFairValueDisclosure	52638000	USD
CY2020Q4	us-gaap	Notes Receivable Fair Value Disclosure NotesReceivableFairValueDisclosure	18960000	USD
CY2020Q4	us-gaap	Notes Receivable Fair Value Disclosure NotesReceivableFairValueDisclosure	18960000	USD
CY2020Q4	us-gaap	Property Subject To Or Available For Operating Lease Number Of Units PropertySubjectToOrAvailableForOperatingLeaseNumberOfUnits	33
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	4967000	USD
CY2021Q1	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	217000	USD
CY2020Q4	sui	Operatingand Finance Leases Liability Payments Due Next Twelve Months OperatingandFinanceLeasesLiabilityPaymentsDueNextTwelveMonths	5184000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	4844000	USD
CY2021Q1	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	213000	USD
CY2020Q4	sui	Operatingand Finance Liability Payments Due Year Two OperatingandFinanceLiabilityPaymentsDueYearTwo	5057000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	4931000	USD
CY2021Q1	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	196000	USD
CY2020Q4	sui	Operatingand Finance Liability Payments Due Year Three OperatingandFinanceLiabilityPaymentsDueYearThree	5127000	USD
CY2019	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	103000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	5251000	USD
CY2021Q1	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	4068000	USD
CY2020Q4	sui	Operatingand Finance Liability Payments Due Year Four OperatingandFinanceLiabilityPaymentsDueYearFour	9319000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	5281000	USD
CY2021Q1	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	0	USD
CY2020Q4	sui	Operatingand Finance Liability Payments Due Year Five OperatingandFinanceLiabilityPaymentsDueYearFive	5281000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	61397000	USD
CY2021Q1	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	0	USD
CY2020Q4	sui	Operatingand Finance Liability Payments Due After Year Five OperatingandFinanceLiabilityPaymentsDueAfterYearFive	61397000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	86671000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	4694000	USD
CY2020Q4	sui	Operatingand Finance Liability Payments Due OperatingandFinanceLiabilityPaymentsDue	91365000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	36707000	USD
CY2021Q1	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	360000	USD
CY2020Q4	sui	Operatingand Finance Liability Undiscounted Excess Amount OperatingandFinanceLiabilityUndiscountedExcessAmount	37067000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	49964000	USD
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	4334000	USD
CY2020Q4	sui	Operatingand Finance Liability OperatingandFinanceLiability	54298000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	4350000	USD
CY2019Q4	us-gaap	Capital Leased Assets Gross CapitalLeasedAssetsGross	4081000	USD
CY2020	sui	Rightof Use Asset Obtainedin Exchangefor New Operating Lease Liability RightofUseAssetObtainedinExchangeforNewOperatingLeaseLiability	48419000	USD
CY2019	sui	Rightof Use Asset Obtainedin Exchangefor New Operating Lease Liability RightofUseAssetObtainedinExchangeforNewOperatingLeaseLiability	23751000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	27614000	USD
CY2019Q4	us-gaap	Below Market Lease Net BelowMarketLeaseNet	28366000	USD
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	4334000	USD
CY2019Q4	us-gaap	Capital Lease Obligations CapitalLeaseObligations	4081000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	49964000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	24222000	USD
CY2020	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	33000	USD
CY2019	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	17000	USD
CY2020	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	104000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	4255000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	3474000	USD
CY2020	us-gaap	Lease Cost LeaseCost	6720000	USD
CY2019	us-gaap	Lease Cost LeaseCost	5178000	USD
CY2018	us-gaap	Capital Leases Income Statement Amortization Expense CapitalLeasesIncomeStatementAmortizationExpense	16000	USD
CY2018	us-gaap	Capital Leases Income Statement Interest Expense CapitalLeasesIncomeStatementInterestExpense	104000	USD
CY2018	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	3310000	USD
CY2018	us-gaap	Lease Cost LeaseCost	4251000	USD
CY2021Q1	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P3Y5M15D
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P27Y4M20D
CY2021Q1	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0243
CY2021Q1	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0379
CY2021Q1	us-gaap	Operating Lease Payments OperatingLeasePayments	2712000	USD
CY2020Q1	us-gaap	Operating Lease Payments OperatingLeasePayments	2199000	USD
CY2018	us-gaap	Operating Lease Payments OperatingLeasePayments	3340000	USD
CY2021Q1	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	137000	USD
CY2020Q1	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	120000	USD
CY2018	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	120000	USD
CY2020	sui	Operatingand Financing Payments OperatingandFinancingPayments	2849000	USD
CY2019	sui	Operatingand Financing Payments OperatingandFinancingPayments	2319000	USD
CY2018	sui	Operatingand Financing Payments OperatingandFinancingPayments	3460000	USD
CY2020Q4	sui	Percentof Operating Leases Where Companyisthe Lessor PercentofOperatingLeasesWhereCompanyistheLessor	0.95
CY2020Q4	us-gaap	Lessor Operating Lease Payments To Be Received Next Twelve Months LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths	9476000	USD
CY2020Q4	us-gaap	Lessor Operating Lease Payments To Be Received Two Years LessorOperatingLeasePaymentsToBeReceivedTwoYears	5402000	USD
CY2020Q4	us-gaap	Lessor Operating Lease Payments To Be Received Three Years LessorOperatingLeasePaymentsToBeReceivedThreeYears	3357000	USD
CY2020Q4	us-gaap	Lessor Operating Lease Payments To Be Received Four Years LessorOperatingLeasePaymentsToBeReceivedFourYears	1895000	USD
CY2020Q4	us-gaap	Lessor Operating Lease Payments To Be Received Five Years LessorOperatingLeasePaymentsToBeReceivedFiveYears	1078000	USD
CY2020Q4	us-gaap	Lessor Operating Lease Payments To Be Received Thereafter LessorOperatingLeasePaymentsToBeReceivedThereafter	2553000	USD
CY2020Q4	us-gaap	Lessor Operating Lease Payments To Be Received LessorOperatingLeasePaymentsToBeReceived	23761000	USD
CY2020	us-gaap	Lease Income LeaseIncome	2075000	USD
CY2020Q1	sui	Related Party Transaction Equity Interest In Office Space Percentage RelatedPartyTransactionEquityInterestInOfficeSpacePercentage	0.01
CY2020Q1	us-gaap	Net Rentable Area NetRentableArea	103100	sqft
CY2020Q4	us-gaap	Net Rentable Area NetRentableArea	20087	sqft
CY2020Q4	us-gaap	Deferred Rent Credit DeferredRentCredit	4400000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Mark To Market AdjustmentsToAdditionalPaidInCapitalMarkToMarket	300000	USD
CY2019Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	8919600000	USD
CY2018Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	7560946000	USD
CY2017Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	6882879000	USD
CY2020	sui	Real Estate Other Acquisitions And Improvements RealEstateOtherAcquisitionsAndImprovements	2410900000	USD
CY2019	sui	Real Estate Other Acquisitions And Improvements RealEstateOtherAcquisitionsAndImprovements	930668000	USD
CY2018	sui	Real Estate Other Acquisitions And Improvements RealEstateOtherAcquisitionsAndImprovements	414840000	USD
CY2020	us-gaap	Real Estate Other Additions RealEstateOtherAdditions	246454000	USD
CY2019	us-gaap	Real Estate Other Additions RealEstateOtherAdditions	281808000	USD
CY2018	us-gaap	Real Estate Other Additions RealEstateOtherAdditions	152672000	USD
CY2020	us-gaap	Real Estate Improvements RealEstateImprovements	249275000	USD
CY2019	us-gaap	Real Estate Improvements RealEstateImprovements	233984000	USD
CY2018	us-gaap	Real Estate Improvements RealEstateImprovements	205006000	USD
CY2020	sui	Real Estate Dispositions And Other RealEstateDispositionsAndOther	141626000	USD
CY2019	sui	Real Estate Dispositions And Other RealEstateDispositionsAndOther	87806000	USD
CY2018	sui	Real Estate Dispositions And Other RealEstateDispositionsAndOther	94451000	USD
CY2020Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	11684603000	USD
CY2019Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	8919600000	USD
CY2018Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	7560946000	USD
CY2019Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	1686980000	USD
CY2018Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	1442630000	USD
CY2017Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	1237525000	USD
CY2020	us-gaap	Sec Schedule Iii Real Estate Accumulated Depreciation Depreciation Expense SECScheduleIIIRealEstateAccumulatedDepreciationDepreciationExpense	344478000	USD
CY2019	us-gaap	Sec Schedule Iii Real Estate Accumulated Depreciation Depreciation Expense SECScheduleIIIRealEstateAccumulatedDepreciationDepreciationExpense	291605000	USD
CY2018	us-gaap	Sec Schedule Iii Real Estate Accumulated Depreciation Depreciation Expense SECScheduleIIIRealEstateAccumulatedDepreciationDepreciationExpense	253952000	USD
CY2020	us-gaap	Real Estate Accumulated Depreciation Other Deductions RealEstateAccumulatedDepreciationOtherDeductions	7000	USD
CY2019	us-gaap	Real Estate Accumulated Depreciation Other Deductions RealEstateAccumulatedDepreciationOtherDeductions	0	USD
CY2018	us-gaap	Real Estate Accumulated Depreciation Other Deductions RealEstateAccumulatedDepreciationOtherDeductions	0	USD
CY2020	sui	Real Estate Accumulated Depreciation Dispositions And Other RealEstateAccumulatedDepreciationDispositionsAndOther	62639000	USD
CY2019	sui	Real Estate Accumulated Depreciation Dispositions And Other RealEstateAccumulatedDepreciationDispositionsAndOther	47255000	USD
CY2018	sui	Real Estate Accumulated Depreciation Dispositions And Other RealEstateAccumulatedDepreciationDispositionsAndOther	48847000	USD
CY2020Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	1968812000	USD
CY2019Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	1686980000	USD

Files In Submission

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0000912593-21-000054-index-headers.html	Edgar Link	pending
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$SUI
SUN COMMUNITIES INC Stock $sui

2020 Q4 Form 10-K Financial Statement

#000091259321000054 Filed on February 18, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SUI SUN COMMUNITIES INC Stock $sui

2020 Q4 Form 10-K Financial Statement

#000091259321000054 Filed on February 18, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SUI
SUN COMMUNITIES INC Stock $sui