$SUI
SUN COMMUNITIES INC Stock $sui

$sui Overview Financials Valuation SEC Filings Company Website

2019 Q3 Form 10-K Financial Statement

#000091259320000041 Filed on February 20, 2020

Income Statement

Concept	2019 Q3	2018 Q4	2018 Q3
Revenue	$362.4M	$274.0M	$323.4M
YoY Change	12.07%	13.21%	20.57%
Cost Of Revenue	$36.32M	$115.8M	$33.69M
YoY Change	7.79%	13.98%	-70.5%
Gross Profit	$326.1M	$158.2M	$289.7M
YoY Change	12.57%	12.6%	88.01%
Gross Profit Margin	89.98%	57.74%	89.58%
Selling, General & Admin	$26.92M	$25.00M	$23.81M
YoY Change	13.07%	-19.09%	10.91%
% of Gross Profit	8.25%	15.8%	8.22%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$76.53M	$81.10M	$71.98M
YoY Change	6.32%	12.95%	12.07%
% of Gross Profit	23.47%	51.26%	24.85%
Operating Expenses	$26.92M	$106.0M	$23.81M
YoY Change	13.07%	3.21%	10.91%
Operating Profit	$299.2M	$52.20M	$175.8M
YoY Change	70.15%	38.1%	19.64%
Interest Expense	-$33.40M	-$33.40M	$33.52M
YoY Change	-199.64%	-0.3%	4.48%
% of Operating Profit	-11.16%	-63.98%	19.06%
Other Income/Expense, Net	-$1.362M	-$5.300M	$1.231M
YoY Change	-210.64%	-255.88%	-63.2%
Pretax Income	$56.45M	$16.84M	$50.29M
YoY Change	12.25%	134.69%	97.28%
Income Tax	$800.0K	-$100.0K	$213.0K
% Of Pretax Income	1.42%	-0.59%	0.42%
Net Earnings	$57.00M	$9.039M	$46.06M
YoY Change	23.76%	21.52%	91.0%
Net Earnings / Revenue	15.73%	3.3%	14.24%
Basic Earnings Per Share	$0.63	$0.11	$0.56
Diluted Earnings Per Share	$0.63	$0.11	$0.56
COMMON SHARES
Basic Shares Outstanding	89.85M shares	86.36M shares	81.60M shares
Diluted Shares Outstanding	90.33M shares		82.08M shares

Balance Sheet

Concept	2019 Q3	2018 Q4	2018 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$120.9M	$99.34M	$114.0M
YoY Change	6.07%	893.37%	-16.79%
Cash & Equivalents	$26.20M	$50.30M	$113.6M
Short-Term Investments	$94.73M	$49.04M
Other Short-Term Assets
YoY Change
Inventory	$55.00M	$49.00M	$41.00M
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets	$249.0M	$253.0M	$317.0M
YoY Change	-21.45%	17.13%	-8.12%
LONG-TERM ASSETS
Property, Plant & Equipment	$6.814B	$6.118B	$6.054B
YoY Change	12.55%	8.38%	8.61%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$37.94M	$30.60M
YoY Change
Other Assets
YoY Change
Total Long-Term Assets	$7.553B	$6.457B	$6.337B
YoY Change	19.19%	9.52%	9.01%
TOTAL ASSETS
Total Short-Term Assets	$249.0M	$253.0M	$317.0M
Total Long-Term Assets	$7.553B	$6.457B	$6.337B
Total Assets	$7.802B	$6.710B	$6.654B
YoY Change	17.26%	9.79%	8.05%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$25.00M
YoY Change
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	$95.00M	$63.00M	$63.00M
YoY Change	50.79%	14.55%	10.53%
LONG-TERM LIABILITIES
Long-Term Debt	$3.275B	$3.124B	$3.005B
YoY Change	8.99%	1.46%	0.07%
Other Long-Term Liabilities	$351.0M	$292.0M	$299.0M
YoY Change	17.39%	7.75%	2.75%
Total Long-Term Liabilities	$3.626B	$3.416B	$3.304B
YoY Change	9.75%	1.97%	0.3%
TOTAL LIABILITIES
Total Short-Term Liabilities	$95.00M	$63.00M	$63.00M
Total Long-Term Liabilities	$3.626B	$3.416B	$3.304B
Total Liabilities	$3.721B	$3.479B	$3.367B
YoY Change	10.5%	2.17%	0.49%
SHAREHOLDERS EQUITY
Retained Earnings
YoY Change
Common Stock	$907.0K	$864.0K	$864.0K
YoY Change	4.98%	8.41%	8.95%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$3.500B	$3.107B	$3.159B
YoY Change
Total Liabilities & Shareholders Equity	$7.398B	$6.710B	$6.654B
YoY Change	11.18%	9.79%	8.05%

Cashflow Statement

Concept	2019 Q3	2018 Q4	2018 Q3
OPERATING ACTIVITIES
Net Income	$57.00M	$9.039M	$46.06M
YoY Change	23.76%	21.52%	91.0%
Depreciation, Depletion And Amortization	$76.53M	$81.10M	$71.98M
YoY Change	6.32%	12.95%	12.07%
Cash From Operating Activities	$138.5M	$61.90M	$102.5M
YoY Change	35.12%	94.04%	47.48%
INVESTING ACTIVITIES
Capital Expenditures	-$95.70M	-$14.60M	-$45.30M
YoY Change	111.26%	-70.86%	49.01%
Acquisitions
YoY Change
Other Investing Activities	-$133.0M	-$174.1M	-$92.30M
YoY Change	44.1%	107.51%	31.48%
Cash From Investing Activities	-$228.8M	-$188.6M	-$137.6M
YoY Change	66.28%	40.85%	36.78%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net			$499.9M
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	86.10M	60.30M	127.2M
YoY Change	-32.31%	-289.62%	-272.12%
NET CHANGE
Cash From Operating Activities	138.5M	61.90M	102.5M
Cash From Investing Activities	-228.8M	-188.6M	-137.6M
Cash From Financing Activities	86.10M	60.30M	127.2M
Net Change In Cash	-4.200M	-66.40M	92.10M
YoY Change	-104.56%	-50.37%	-187.71%
FREE CASH FLOW
Cash From Operating Activities	$138.5M	$61.90M	$102.5M
Capital Expenditures	-$95.70M	-$14.60M	-$45.30M
Free Cash Flow	$234.2M	$76.50M	$147.8M
YoY Change	58.46%	-6.71%	47.95%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2019	dei	Amendment Flag AmendmentFlag	false
CY2019	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2019	dei	Document Annual Report DocumentAnnualReport	true
CY2019	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2019	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2019
CY2019	dei	Document Transition Report DocumentTransitionReport	false
CY2019	dei	Entity Central Index Key EntityCentralIndexKey	0000912593
CY2018Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2019Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	180000000	shares
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	180000000	shares
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	86357000	shares
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	93174000	shares
CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	86357000	shares
CY2019Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	93174000	shares
CY2017	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	2755	USD
CY2018	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	4328	USD
CY2019	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	7943	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
CY2019	dei	Document Type DocumentType	10-K
CY2019	dei	Document Period End Date DocumentPeriodEndDate	2019-12-31
CY2019	dei	Entity File Number EntityFileNumber	1-12616
CY2019	dei	Entity Registrant Name EntityRegistrantName	SUN COMMUNITIES INC
CY2019	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	MD
CY2019	dei	Entity File Number EntityFileNumber	1-12616
CY2019	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	38-2730780
CY2019	dei	Entity Address Address Line1 EntityAddressAddressLine1	27777 Franklin Rd,
CY2019	dei	Entity Address Address Line2 EntityAddressAddressLine2	Suite 200,
CY2019	dei	Entity Address City Or Town EntityAddressCityOrTown	Southfield,
CY2019	dei	Entity Address State Or Province EntityAddressStateOrProvince	MI
CY2019	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	48034
CY2019	dei	City Area Code CityAreaCode	248
CY2019	dei	Local Phone Number LocalPhoneNumber	208-2500
CY2019	dei	Security12b Title Security12bTitle	Common Stock, $0.01 par value
CY2019	dei	Trading Symbol TradingSymbol	SUI
CY2019	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2019	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2019	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2019	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2019	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2019	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2019	dei	Entity Small Business EntitySmallBusiness	false
CY2019	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2019	dei	Entity Shell Company EntityShellCompany	false
CY2019Q2	dei	Entity Public Float EntityPublicFloat	11363494077	USD
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CY2019Q4	us-gaap	Land Land	1414279000	USD
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CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-222000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-507000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-582000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	177379000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	120158000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	81819000	USD
CY2019	sui	Preferredreturnto Series A1preferred O Punits PreferredreturntoSeriesA1preferredOPunits	6058000	USD
CY2018	sui	Preferredreturnto Series A1preferred O Punits PreferredreturntoSeriesA1preferredOPunits	4486000	USD
CY2017	sui	Preferredreturnto Series A1preferred O Punits PreferredreturntoSeriesA1preferredOPunits	4581000	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
CY2017	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	5055000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	161553000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	107229000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	72183000	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
CY2017	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	7162000	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
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	65021000	USD
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
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	76084000	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
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	76711000	shares
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.80
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.29
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.85
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.80
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.29
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.85
CY2019	us-gaap	Profit Loss ProfitLoss	177379000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	120158000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	81819000	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
CY2017	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	4527000	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
CY2017	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	86346000	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
CY2017	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	5299000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	170784000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	106109000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	81047000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	177379000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	120158000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	81819000	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
CY2017	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	9338000	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
CY2017	us-gaap	Foreign Currency Transaction Gain Loss Unrealized ForeignCurrencyTransactionGainLossUnrealized	6146000	USD
CY2019	sui	Remeasurement Of Marketable Securities RemeasurementOfMarketableSecurities	34240000	USD
CY2018	sui	Remeasurement Of Marketable Securities RemeasurementOfMarketableSecurities	-3639000	USD
CY2017	sui	Remeasurement Of Marketable Securities RemeasurementOfMarketableSecurities	0	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
CY2017	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain Or Loss BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGainOrLoss	3035000	USD
CY2019	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	0	USD
CY2018	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	0	USD
CY2017	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	742000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	17482000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	15066000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	12695000	USD
CY2019	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	313966000	USD
CY2018	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	274432000	USD
CY2017	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	256193000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-222000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-507000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-582000	USD
CY2019	us-gaap	Amortization Of Below Market Lease AmortizationOfBelowMarketLease	7442000	USD
CY2018	us-gaap	Amortization Of Below Market Lease AmortizationOfBelowMarketLease	7399000	USD
CY2017	us-gaap	Amortization Of Below Market Lease AmortizationOfBelowMarketLease	7402000	USD
CY2019	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	-4962000	USD
CY2018	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	-6353000	USD
CY2017	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	-8205000	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
CY2017	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	2910000	USD
CY2019	sui	Amortizationof Ground Lease AmortizationofGroundLease	752000	USD
CY2018	sui	Amortizationof Ground Lease AmortizationofGroundLease	1638000	USD
CY2017	sui	Amortizationof Ground Lease AmortizationofGroundLease	1914000	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
CY2017	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-4676000	USD
CY2019	us-gaap	Payments Of Distributions To Affiliates PaymentsOfDistributionsToAffiliates	1374000	USD
CY2018	us-gaap	Payments Of Distributions To Affiliates PaymentsOfDistributionsToAffiliates	790000	USD
CY2017	us-gaap	Payments Of Distributions To Affiliates PaymentsOfDistributionsToAffiliates	0	USD
CY2019	sui	Distributions From Affiliate DistributionsFromAffiliate	-3049000	USD
CY2018	sui	Distributions From Affiliate DistributionsFromAffiliate	0	USD
CY2017	sui	Distributions From Affiliate DistributionsFromAffiliate	0	USD
CY2019	us-gaap	Increase Decrease In Notes Receivables IncreaseDecreaseInNotesReceivables	-2988000	USD
CY2018	us-gaap	Increase Decrease In Notes Receivables IncreaseDecreaseInNotesReceivables	2299000	USD
CY2017	us-gaap	Increase Decrease In Notes Receivables IncreaseDecreaseInNotesReceivables	26193000	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
CY2017	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	33031000	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
CY2017	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-9034000	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
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	257983000	USD
CY2019	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	569261000	USD
CY2018	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	389399000	USD
CY2017	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	288537000	USD
CY2019	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	472681000	USD
CY2018	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	320268000	USD
CY2017	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	120377000	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
CY2017	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	8575000	USD
CY2019	sui	Issuanceofnotesandotherreceivables Issuanceofnotesandotherreceivables	18122000	USD
CY2018	sui	Issuanceofnotesandotherreceivables Issuanceofnotesandotherreceivables	216000	USD
CY2017	sui	Issuanceofnotesandotherreceivables Issuanceofnotesandotherreceivables	3918000	USD
CY2019	sui	Repaymentof Notesand Other Receivables RepaymentofNotesandOtherReceivables	4542000	USD
CY2018	sui	Repaymentof Notesand Other Receivables RepaymentofNotesandOtherReceivables	4312000	USD
CY2017	sui	Repaymentof Notesand Other Receivables RepaymentofNotesandOtherReceivables	2615000	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
CY2017	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	0	USD
CY2019	us-gaap	Proceeds From Contributions From Affiliates ProceedsFromContributionsFromAffiliates	44470000	USD
CY2018	us-gaap	Proceeds From Contributions From Affiliates ProceedsFromContributionsFromAffiliates	970000	USD
CY2017	us-gaap	Proceeds From Contributions From Affiliates ProceedsFromContributionsFromAffiliates	0	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
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-401642000	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
CY2017	us-gaap	Proceeds From Issuance Or Sale Of Equity ProceedsFromIssuanceOrSaleOfEquity	487677000	USD
CY2019	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	3881543000	USD
CY2018	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	1542677000	USD
CY2017	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	661000000	USD
CY2019	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	3883950000	USD
CY2018	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	1456486000	USD
CY2017	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	719536000	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
CY2017	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	185153000	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	552868000	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	298754000	USD
CY2017	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	124427000	USD
CY2019	sui	Prepayment Penalty Debt PrepaymentPenaltyDebt	18838000	USD
CY2018	sui	Prepayment Penalty Debt PrepaymentPenaltyDebt	2024000	USD
CY2017	sui	Prepayment Penalty Debt PrepaymentPenaltyDebt	6019000	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
CY2017	sui	Distributions To Stockholders Op Unit Holders And Preferred Op Unit Holders DistributionsToStockholdersOpUnitHoldersAndPreferredOpUnitHolders	224483000	USD
CY2019	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	6756000	USD
CY2018	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	2130000	USD
CY2017	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	3650000	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
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	141557000	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
CY2017	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	298000	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
CY2017	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-1804000	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
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	25313000	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
CY2019	us-gaap	Interest Paid Net InterestPaidNet	134990000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	126153000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	124046000	USD
CY2019	us-gaap	Distributions On Mandatorily Redeemable Securities DistributionsOnMandatorilyRedeemableSecurities	4698000	USD
CY2018	us-gaap	Distributions On Mandatorily Redeemable Securities DistributionsOnMandatorilyRedeemableSecurities	2551000	USD
CY2017	us-gaap	Distributions On Mandatorily Redeemable Securities DistributionsOnMandatorilyRedeemableSecurities	3114000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	948000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	461000	USD
CY2017	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-194000	USD
CY2019	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	107731000	USD
CY2018	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	21451000	USD
CY2017	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	23449000	USD
CY2019	us-gaap	Dividends Dividends	8452000	USD
CY2018	us-gaap	Dividends Dividends	7889000	USD
CY2017	us-gaap	Dividends Dividends	3267000	USD
CY2019	us-gaap	Conversion Of Stock Amount Converted1 ConversionOfStockAmountConverted1	11310000	USD
CY2018	us-gaap	Conversion Of Stock Amount Converted1 ConversionOfStockAmountConverted1	1515000	USD
CY2017	us-gaap	Conversion Of Stock Amount Converted1 ConversionOfStockAmountConverted1	3556000	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
CY2017	sui	Conversion Of Series A Four Preferred Stock ConversionOfSeriesAFourPreferredStock	4720000	USD
CY2019	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	0	USD
CY2018	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	0	USD
CY2017	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	4114000	USD
CY2019	sui	Settlementofmembershipinterest Settlementofmembershipinterest	313391000	USD
CY2018	sui	Settlementofmembershipinterest Settlementofmembershipinterest	0	USD
CY2017	sui	Settlementofmembershipinterest Settlementofmembershipinterest	28410000	USD
CY2019	sui	Land Capital Lease LandCapitalLease	0	USD
CY2018	sui	Land Capital Lease LandCapitalLease	21976000	USD
CY2017	sui	Land Capital Lease LandCapitalLease	0	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
CY2017	sui	Stock Issued During Period Value New Issues Series A3 Preferred Op Units StockIssuedDuringPeriodValueNewIssuesSeriesA3PreferredOPUnits	4592000	USD
CY2019	sui	Noncash Or Part Noncash Acquisition Noncash Financial Or Equity Instrument Consideration Escrow NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationEscrow	392000	USD
CY2018	sui	Noncash Or Part Noncash Acquisition Noncash Financial Or Equity Instrument Consideration Escrow NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationEscrow	0	USD
CY2017	sui	Noncash Or Part Noncash Acquisition Noncash Financial Or Equity Instrument Consideration Escrow NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationEscrow	0	USD
CY2016Q4	us-gaap	Temporary Equity Carrying Amount Including Portion Attributable To Noncontrolling Interests TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests	66944000	USD
CY2017	us-gaap	Temporary Equity Accretion To Redemption Value TemporaryEquityAccretionToRedemptionValue	5166000	USD
CY2017	us-gaap	Temporary Equity Net Income TemporaryEquityNetIncome	205000	USD
CY2017	sui	Temporary Equity Dividends TemporaryEquityDividends	-845000	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
CY2019Q4	us-gaap	Number Of Real Estate Properties NumberOfRealEstateProperties	422	properties
CY2019Q4	us-gaap	Number Of States In Which Entity Operates NumberOfStatesInWhichEntityOperates	33	properties
CY2019Q4	us-gaap	Number Of Units In Real Estate Property NumberOfUnitsInRealEstateProperty	141293	sites
CY2019	us-gaap	Use Of Estimates UseOfEstimates	<div style="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Use of Estimates</span></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">The preparation of financial statements in conformity with U.S. generally accepted accounting principles (“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>
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	22100000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	50300000	USD
CY2019Q4	us-gaap	Cash Uninsured Amount CashUninsuredAmount	22900000	USD
CY2018Q4	us-gaap	Cash Uninsured Amount CashUninsuredAmount	49500000	USD
CY2019Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	12700000	USD
CY2018Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	12000000.0	USD
CY2019Q4	us-gaap	Marketable Securities MarketableSecurities	94700000	USD
CY2019	sui	Cost Method Investment Policy Maximum Percentage Of Ownership CostMethodInvestmentPolicyMaximumPercentageOfOwnership	0.050
CY2019Q4	us-gaap	Debt Issuance Costs Line Of Credit Arrangements Net DebtIssuanceCostsLineOfCreditArrangementsNet	4500000	USD
CY2018Q4	us-gaap	Debt Issuance Costs Line Of Credit Arrangements Net DebtIssuanceCostsLineOfCreditArrangementsNet	4700000	USD
CY2019	sui	Deferred Financing Costsand Discountand Premium Costs DeferredFinancingCostsandDiscountandPremiumCosts	7900000	USD
CY2018	sui	Deferred Financing Costsand Discountand Premium Costs DeferredFinancingCostsandDiscountandPremiumCosts	2400000	USD
CY2019	us-gaap	Advertising Expense AdvertisingExpense	6700000	USD
CY2018	us-gaap	Advertising Expense AdvertisingExpense	6200000	USD
CY2017	us-gaap	Advertising Expense AdvertisingExpense	5900000	USD
CY2019	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	4500000	USD
CY2018	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	8400000	USD
CY2017	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	5900000	USD
CY2017	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	742228000	USD
CY2017	sui	Revenue From Home Sales RevenueFromHomeSales	127408000	USD
CY2017	sui	Rental Home Revenue RentalHomeRevenue	50549000	USD
CY2017	sui	Ancillary Revenue AncillaryRevenue	37511000	USD
CY2017	us-gaap	Interest Income Operating InterestIncomeOperating	21179000	USD
CY2017	sui	Brokeragecommissionsandotherincomenet Brokeragecommissionsandotherincomenet	3695000	USD
CY2019	us-gaap	Revenues Revenues	1264037000	USD
CY2018	us-gaap	Revenues Revenues	1126825000	USD
CY2017	us-gaap	Revenues Revenues	982570000	USD
CY2019	us-gaap	Contract With Customer Asset Reclassified To Receivable ContractWithCustomerAssetReclassifiedToReceivable	20900000	USD
CY2018	us-gaap	Contract With Customer Asset Reclassified To Receivable ContractWithCustomerAssetReclassifiedToReceivable	16100000	USD
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
CY2019	us-gaap	Business Acquisition Equity Interests Issued Or Issuable Number Of Shares Issued BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued	1972876	shares
CY2019	sui	Numberof Mh Sites NumberofMHSites	201	site
CY2019	sui	Numberof Rv Sites NumberofRVSites	301	site
CY2019	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 Intangibles BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles	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
CY2019Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Noncurrent Liabilities Long Term Debt BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt	61900000	USD
CY2019	us-gaap	Business Combination Consideration Transferred Equity Interests Issued And Issuable BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable	365321000	USD
CY2019	us-gaap	Business Combination Consideration Transferred1 BusinessCombinationConsiderationTransferred1	853682000	USD
CY2019	sui	Real Estate Acquisition Costs RealEstateAcquisitionCosts	19300000	USD
CY2019Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Land BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLand	7700000	USD
CY2019Q4	sui	Number Of Sites Suitable For Development NumberOfSitesSuitableForDevelopment	900	expansion_site
CY2019Q1	sui	Purchaseof Tangible Property PurchaseofTangibleProperty	300000	USD
CY2019	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	42715000	USD
CY2019	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	10050000	USD
CY2018Q4	us-gaap	Number Of Units In Real Estate Property NumberOfUnitsInRealEstateProperty	4882	site
CY2018Q4	sui	Numberof Unitsin Real Estate Property Development Sites NumberofUnitsinRealEstatePropertyDevelopmentSites	1166	development_site
CY2018Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Property Plant And Equipment BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment	346986000	USD
CY2018Q4	sui	Business Combination Recognized Identifiable Assets Acquiredand Liabilities Assumed Current Assets Liabilities Inventory BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentAssetsLiabilitiesInventory	17199000	USD
CY2018Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Noncurrent Liabilities Long Term Debt BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt	-3120000	USD
CY2018Q4	sui	Business Combination Recognized Identifiable Assets Acquiredand Liabilities Assumed Other Liabilities BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherLiabilities	-11990000	USD
CY2018Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Net BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet	349075000	USD
CY2018	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	291822000	USD
CY2018	sui	Business Combination Consideration Transferred Other Liabilities Incurred Net BusinessCombinationConsiderationTransferredOtherLiabilitiesIncurredNet	35277000	USD
CY2018Q4	sui	Numberof Unitsin Real Estate Property Land Development Sites NumberofUnitsinRealEstatePropertyLandDevelopmentSites	2275	site
CY2018	us-gaap	Payments To Acquire Land PaymentsToAcquireLand	14000000.0	USD
CY2019Q4	sui	Derecognitionofcollateralizedrecievables Derecognitionofcollateralizedrecievables	-90350000	USD
CY2018Q4	sui	Derecognitionofcollateralizedrecievables Derecognitionofcollateralizedrecievables	0	USD
CY2019	us-gaap	Allowance For Loan And Lease Losses Adjustments Net AllowanceForLoanAndLeaseLossesAdjustmentsNet	-587000	USD
CY2018	us-gaap	Allowance For Loan And Lease Losses Adjustments Net AllowanceForLoanAndLeaseLossesAdjustmentsNet	0	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
CY2019Q4	sui	Home Sale Proceeds HomeSaleProceeds	20900000	USD
CY2019Q4	sui	Insurance Receivables InsuranceReceivables	9900000	USD
CY2018Q4	sui	Other Receivables For Rent Water Sewer Usage OtherReceivablesForRentWaterSewerUsage	7100000	USD
CY2018Q4	sui	Allowance For Rent Water Sewer Usage Receivables AllowanceForRentWaterSewerUsageReceivables	1500000	USD
CY2018	us-gaap	Contract With Customer Asset Reclassified To Receivable ContractWithCustomerAssetReclassifiedToReceivable	16100000	USD
CY2018Q4	sui	Insurance Receivables InsuranceReceivables	24100000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	144256000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	76740000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	120188000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	61010000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	15730000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	13420000	USD
CY2017	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	14113000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	15522000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	15130000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	10529000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	7154000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	4791000	USD
CY2019Q4	us-gaap	Equity Method Investments EquityMethodInvestments	34800000	USD
CY2018Q4	us-gaap	Equity Method Investments EquityMethodInvestments	30600000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	1374000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	790000	USD
CY2019Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Assets VariableInterestEntityConsolidatedCarryingAmountAssets	368194000	USD
CY2018Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Assets VariableInterestEntityConsolidatedCarryingAmountAssets	327980000	USD
CY2019Q4	sui	Variable Interest Entityasa Percentageof Consolidated Assets VariableInterestEntityasaPercentageofConsolidatedAssets	0.047	Rate
CY2018Q4	sui	Variable Interest Entityasa Percentageof Consolidated Assets VariableInterestEntityasaPercentageofConsolidatedAssets	0.049	Rate
CY2019Q4	sui	Variable Interest Entityasa Percentageof Consolidated Liabilities VariableInterestEntityasaPercentageofConsolidatedLiabilities	0.025
CY2018Q4	sui	Variable Interest Entityasa Percentageof Consolidated Liabilities VariableInterestEntityasaPercentageofConsolidatedLiabilities	0.026	Rate
CY2018Q4	sui	Vi Easa Percentageof Total Equity VIEasaPercentageofTotalEquity	0.010
CY2018Q4	us-gaap	Line Of Credit LineOfCredit	128000000	USD
	sui	Debtweightedaveragetomaturitylength Debtweightedaveragetomaturitylength	P11Y1M6D
CY2018	sui	Debtweightedaveragetomaturitylength Debtweightedaveragetomaturitylength	P9Y
CY2019Q3	us-gaap	Debt Weighted Average Interest Rate DebtWeightedAverageInterestRate	0.040	Rate
CY2018Q4	us-gaap	Debt Weighted Average Interest Rate DebtWeightedAverageInterestRate	0.045	Rate
CY2019Q1	us-gaap	Secured Debt SecuredDebt	3200000000	USD
CY2018Q2	sui	Financial Instruments Subjectto Mandatory Redemption Rate Of Return FinancialInstrumentsSubjecttoMandatoryRedemptionRateOfReturn	0.060
CY2018Q2	sui	Financial Instruments Subjectto Mandatory Redemption Term FinancialInstrumentsSubjecttoMandatoryRedemptionTerm	P7Y
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	3442282	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	90519	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	222544	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	188730	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	396827	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	407076	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	2136586	USD
CY2019Q2	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	3737500	shares
CY2019Q2	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	452100000	USD
CY2019Q3	sui	Aggregate Valueof Sharestobe Issuedin Accordanceto Sales Agreement AggregateValueofSharestobeIssuedinAccordancetoSalesAgreement	450000000.0	USD
CY2019	sui	Commission Maximum Percentageof Gross Sales Price Per Share Accordingto Sales Agreement CommissionMaximumPercentageofGrossSalesPricePerShareAccordingtoSalesAgreement	2.0
	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	163800000	USD
	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	398516	shares
CY2019Q3	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
CY2018Q4	sui	Shares Issued Weighted Average Price Per Share SharesIssuedWeightedAveragePricePerShare	92.98
	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	92600000	USD
CY2017	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	321800	shares
CY2017Q4	sui	Shares Issued Weighted Average Price Per Share SharesIssuedWeightedAveragePricePerShare	93.33
CY2017	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	29700000	USD
CY2017Q2	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	400000000	shares
CY2017Q2	sui	Shares Issued Weighted Average Price Per Share SharesIssuedWeightedAveragePricePerShare	85.01
CY2017Q2	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	33600000	USD
CY2017Q1	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	280502	shares
CY2017Q1	sui	Shares Issued Weighted Average Price Per Share SharesIssuedWeightedAveragePricePerShare	76.47
CY2017Q1	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	21200000	USD
CY2019	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	458541	shares
CY2019	sui	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Percent Expected To Vest SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsPercentExpectedToVest	0.751
CY2018	sui	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Percent Expected To Vest SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsPercentExpectedToVest	0.748
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	17500000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	15100000	USD
CY2017	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	12700000	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
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	9300000	USD
CY2019Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	39000000.0	USD
CY2019Q1	sui	Employee Service Sharebased Compensation Nonvested Awards Expected Compensation Cost To Be Recognized In Next Twelve Months EmployeeServiceSharebasedCompensationNonvestedAwardsExpectedCompensationCostToBeRecognizedInNextTwelveMonths	16600000	USD
CY2019Q1	sui	Employee Service Sharebased Compensation Nonvested Awards Expected Compensation Cost To Be Recognized In Two Years EmployeeServiceSharebasedCompensationNonvestedAwardsExpectedCompensationCostToBeRecognizedInTwoYears	11300000	USD
CY2019Q1	sui	Employee Service Sharebased Compensation Nonvested Awards Expected Compensation Cost To Be Recognized In Three Years EmployeeServiceSharebasedCompensationNonvestedAwardsExpectedCompensationCostToBeRecognizedInThreeYears	7100000	USD
CY2019Q1	sui	Employee Service Sharebased Compensation Nonvested Awards Expected Compensation Cost To Be Recognized After Three Years EmployeeServiceSharebasedCompensationNonvestedAwardsExpectedCompensationCostToBeRecognizedAfterThreeYears	4000000.0	USD
	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	200000	USD
CY2019Q4	sui	Transient Rv Revenue TransientRVRevenue	132300000	USD
	us-gaap	Profit Loss ProfitLoss	177379000	USD
	us-gaap	Profit Loss ProfitLoss	120158000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	81819000	USD
	sui	Preferredreturnto Series A1preferred O Punits PreferredreturntoSeriesA1preferredOPunits	6058000	USD
	sui	Preferredreturnto Series A1preferred O Punits PreferredreturntoSeriesA1preferredOPunits	4486000	USD
CY2017	sui	Preferredreturnto Series A1preferred O Punits PreferredreturntoSeriesA1preferredOPunits	4581000	USD
	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	9768000	USD
	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	8443000	USD
CY2017	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	5055000	USD
	us-gaap	Net Income Loss NetIncomeLoss	161553000	USD
	us-gaap	Net Income Loss NetIncomeLoss	107229000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	72183000	USD
	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	1288000	USD
	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	1736000	USD
CY2017	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	7162000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	160265000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	105493000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	65021000	USD
CY2019Q3	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	7232620000	USD
CY2018Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	6118316000	USD
CY2019Q3	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
CY2019Q3	us-gaap	Inventory Finished Homes InventoryFinishedHomes	62061000	USD
CY2018Q4	us-gaap	Inventory Finished Homes InventoryFinishedHomes	49199000	USD
CY2019Q3	us-gaap	Marketable Securities MarketableSecurities	94727000	USD
CY2018Q4	us-gaap	Marketable Securities MarketableSecurities	49037000	USD
CY2019Q3	us-gaap	Accounts And Notes Receivable Net AccountsAndNotesReceivableNet	157926000	USD
CY2018Q4	us-gaap	Accounts And Notes Receivable Net AccountsAndNotesReceivableNet	160077000	USD
CY2019Q3	us-gaap	Mortgage Loans On Real Estate Commercial And Consumer Net MortgageLoansOnRealEstateCommercialAndConsumerNet	0	USD
CY2018Q4	us-gaap	Mortgage Loans On Real Estate Commercial And Consumer Net MortgageLoansOnRealEstateCommercialAndConsumerNet	106924000	USD
CY2019Q3	us-gaap	Other Assets OtherAssets	219896000	USD
CY2018Q4	us-gaap	Other Assets OtherAssets	164211000	USD
CY2019Q3	us-gaap	Assets Assets	7802060000	USD
CY2018Q4	us-gaap	Assets Assets	6710026000	USD
CY2019Q1	sui	Minimum Percent Of Income From Qualifying Sources To Allow For Real Estate Investment Trust Classification MinimumPercentOfIncomeFromQualifyingSourcesToAllowForRealEstateInvestmentTrustClassification	0.950
CY2019Q1	sui	Required Minimum Percent Of Taxable Income Distributed To Stock Holders RequiredMinimumPercentOfTaxableIncomeDistributedToStockHolders	0.900
CY2017	sui	Tax Witholdingson Distributionsfrom Investment TaxWitholdingsonDistributionsfromInvestment	200000	USD
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	2.96
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
CY2017	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	2.66
CY2017	sui	Percent Of Total Dividends Paid PercentOfTotalDividendsPaid	1.000
CY2019	sui	Ordinary Dividend Taxable Percent OrdinaryDividendTaxablePercent	0.988276
CY2019	sui	Ordinary Tax Dividend Percent Qualified Dividend OrdinaryTaxDividendPercentQualifiedDividend	0.011724
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-3000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-102000	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
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
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	179000	USD
CY2018	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	-4000	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
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	873000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	88000	USD
CY2019	sui	Income Loss Attributableto Taxable Subsidiaries IncomeLossAttributabletoTaxableSubsidiaries	-4122000	USD
CY2018	sui	Income Loss Attributableto Taxable Subsidiaries IncomeLossAttributabletoTaxableSubsidiaries	-7299000	USD
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
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
CY2019	sui	Effective Income Tax Rate Reconciliation Alternative Minimum Tax Amount EffectiveIncomeTaxRateReconciliationAlternativeMinimumTaxAmount	0	USD
CY2019	sui	Effective Income Tax Rate Reconciliation Alternative Minimum Tax Percent EffectiveIncomeTaxRateReconciliationAlternativeMinimumTaxPercent	0
CY2018	sui	Effective Income Tax Rate Reconciliation Alternative Minimum Tax Amount EffectiveIncomeTaxRateReconciliationAlternativeMinimumTaxAmount	0	USD
CY2018	sui	Effective Income Tax Rate Reconciliation Alternative Minimum Tax Percent EffectiveIncomeTaxRateReconciliationAlternativeMinimumTaxPercent	0
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
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
CY2019	sui	Effective Income Tax Rate Reconciliation Changein Deferred Tax Assets Amount EffectiveIncomeTaxRateReconciliationChangeinDeferredTaxAssetsAmount	0	USD
CY2019	sui	Effective Income Tax Rate Reconciliation Changein Deferred Tax Assets Percent EffectiveIncomeTaxRateReconciliationChangeinDeferredTaxAssetsPercent	0
CY2018	sui	Effective Income Tax Rate Reconciliation Changein Deferred Tax Assets Amount EffectiveIncomeTaxRateReconciliationChangeinDeferredTaxAssetsAmount	0	USD
CY2018	sui	Effective Income Tax Rate Reconciliation Changein Deferred Tax Assets Percent EffectiveIncomeTaxRateReconciliationChangeinDeferredTaxAssetsPercent	0
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
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
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
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	873000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	88000	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
CY2019Q4	sui	Deferred Tax Assets Real Estate DeferredTaxAssetsRealEstate	28787000	USD
CY2018Q4	sui	Deferred Tax Assets Real Estate DeferredTaxAssetsRealEstate	28140000	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
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	47191000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	46995000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	-45342000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	-44817000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	1849000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	2178000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	-22813000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	-22406000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	-22813000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	-22406000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	-20964000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	-20228000	USD
CY2019Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	75300000	USD
CY2019Q4	sui	Operating Loss Carryforwards After Tax OperatingLossCarryforwardsAfterTax	15600000	USD
CY2019Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
CY2019	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	0	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
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	700000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	160265000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	105493000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	65021000	USD
	sui	Incomeloss Attributableto Common Stockholders Allocable To Non Vested Restricted Shares IncomelossAttributabletoCommonStockholdersAllocableToNonVestedRestrictedShares	-1170000	USD
	sui	Incomeloss Attributableto Common Stockholders Allocable To Non Vested Restricted Shares IncomelossAttributabletoCommonStockholdersAllocableToNonVestedRestrictedShares	-831000	USD
CY2017	sui	Incomeloss Attributableto Common Stockholders Allocable To Non Vested Restricted Shares IncomelossAttributabletoCommonStockholdersAllocableToNonVestedRestrictedShares	-455000	USD
	sui	Netincomeattributabletocommonshareholdersafterrestrictedstockallocation Netincomeattributabletocommonshareholdersafterrestrictedstockallocation	159095000	USD
	sui	Netincomeattributabletocommonshareholdersafterrestrictedstockallocation Netincomeattributabletocommonshareholdersafterrestrictedstockallocation	104662000	USD
CY2017	sui	Netincomeattributabletocommonshareholdersafterrestrictedstockallocation Netincomeattributabletocommonshareholdersafterrestrictedstockallocation	64566000	USD
	us-gaap	Amount Of Dilutive Securities Stock Options And Restrictive Stock Units AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits	1170000	USD
	us-gaap	Amount Of Dilutive Securities Stock Options And Restrictive Stock Units AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits	831000	USD
CY2017	us-gaap	Amount Of Dilutive Securities Stock Options And Restrictive Stock Units AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits	455000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	160265000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	105493000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	65021000	USD
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	88460000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	81387000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	76084000	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	1000	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	2000	shares
CY2017	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	2000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	454000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	651000	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	625000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	88915000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	82040000	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	76711000	shares
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.80
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.29
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.85
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.80
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.29
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.85
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	4852000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	6169000	shares
CY2017	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	6240000	shares
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
CY2018Q1	us-gaap	Revenues Revenues	257975000	USD
CY2018Q2	us-gaap	Revenues Revenues	271434000	USD
CY2018Q3	us-gaap	Revenues Revenues	323413000	USD
CY2018Q4	us-gaap	Revenues Revenues	274003000	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
CY2018Q1	us-gaap	Costs And Expenses CostsAndExpenses	221871000	USD
CY2018Q2	us-gaap	Costs And Expenses CostsAndExpenses	245125000	USD
CY2018Q3	us-gaap	Costs And Expenses CostsAndExpenses	273119000	USD
CY2018Q4	us-gaap	Costs And Expenses CostsAndExpenses	257162000	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
CY2018Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	36104000	USD
CY2018Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	26309000	USD
CY2018Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	50294000	USD
CY2018Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	16841000	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
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	29986000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	20408000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	46060000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	9039000	USD
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
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.38
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.25
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.56
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.11
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
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.38
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.25
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.56
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.11
CY2019Q3	us-gaap	Notes Receivable Fair Value Disclosure NotesReceivableFairValueDisclosure	18960000	USD
CY2019Q3	us-gaap	Notes Receivable Fair Value Disclosure NotesReceivableFairValueDisclosure	18960000	USD
CY2018Q4	us-gaap	Notes Receivable Fair Value Disclosure NotesReceivableFairValueDisclosure	0	USD
CY2018Q4	us-gaap	Notes Receivable Fair Value Disclosure NotesReceivableFairValueDisclosure	0	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Mark To Market AdjustmentsToAdditionalPaidInCapitalMarkToMarket	300000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Mark To Market AdjustmentsToAdditionalPaidInCapitalMarkToMarket	600000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	2397000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	120000	USD
CY2019Q4	sui	Operatingand Finance Leases Liability Payments Due Next Twelve Months OperatingandFinanceLeasesLiabilityPaymentsDueNextTwelveMonths	2517000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	2446000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	120000	USD
CY2019Q4	sui	Operatingand Finance Liability Payments Due Year Two OperatingandFinanceLiabilityPaymentsDueYearTwo	2566000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	2483000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	120000	USD
CY2019Q4	sui	Operatingand Finance Liability Payments Due Year Three OperatingandFinanceLiabilityPaymentsDueYearThree	2603000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	2572000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	120000	USD
CY2019Q4	sui	Operatingand Finance Liability Payments Due Year Four OperatingandFinanceLiabilityPaymentsDueYearFour	2692000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	2868000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	4060000	USD
CY2019Q4	sui	Operatingand Finance Liability Payments Due Year Five OperatingandFinanceLiabilityPaymentsDueYearFive	6928000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	32277000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	0	USD
CY2019Q4	sui	Operatingand Finance Liability Payments Due After Year Five OperatingandFinanceLiabilityPaymentsDueAfterYearFive	32277000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	45043000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	4540000	USD
CY2019Q4	sui	Operatingand Finance Liability Payments Due OperatingandFinanceLiabilityPaymentsDue	49583000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	20821000	USD
CY2019Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	459000	USD
CY2019Q4	sui	Operatingand Finance Liability Undiscounted Excess Amount OperatingandFinanceLiabilityUndiscountedExcessAmount	21280000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	24222000	USD
CY2019Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	4081000	USD
CY2019Q4	sui	Operatingand Finance Liability OperatingandFinanceLiability	28303000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	4081000	USD
CY2018Q4	us-gaap	Capital Leased Assets Gross CapitalLeasedAssetsGross	4098000	USD
CY2019	sui	Rightof Use Asset Obtainedin Exchangefor New Operating Lease Liability RightofUseAssetObtainedinExchangeforNewOperatingLeaseLiability	23751000	USD
CY2018Q4	us-gaap	Below Market Lease Net BelowMarketLeaseNet	29118000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	28366000	USD
CY2019Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	4081000	USD
CY2018Q4	us-gaap	Capital Lease Obligations CapitalLeaseObligations	4098000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	24222000	USD
CY2019	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	17000	USD
CY2019	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	103000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	3474000	USD
CY2019	us-gaap	Lease Cost LeaseCost	5178000	USD
CY2018	us-gaap	Capital Leases Income Statement Amortization Expense CapitalLeasesIncomeStatementAmortizationExpense	16000	USD
CY2017	us-gaap	Capital Leases Income Statement Amortization Expense CapitalLeasesIncomeStatementAmortizationExpense	0	USD
CY2018	us-gaap	Capital Leases Income Statement Interest Expense CapitalLeasesIncomeStatementInterestExpense	104000	USD
CY2017	us-gaap	Capital Leases Income Statement Interest Expense CapitalLeasesIncomeStatementInterestExpense	0	USD
CY2018	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	3310000	USD
CY2017	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	3303000	USD
CY2018	us-gaap	Lease Cost LeaseCost	4251000	USD
CY2017	us-gaap	Lease Cost LeaseCost	4320000	USD
CY2018Q2	sui	Ground Leases Percent Of Land Acquired GroundLeasesPercentOfLandAcquired	0.50
CY2019Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P4Y6M
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P27Y1M24D
CY2019Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0250
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0415
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	2199000	USD
CY2018	us-gaap	Operating Lease Payments OperatingLeasePayments	3340000	USD
CY2017	us-gaap	Operating Lease Payments OperatingLeasePayments	3182000	USD
CY2019	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	120000	USD
CY2018	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	120000	USD
CY2017	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	121000	USD
CY2019	sui	Operatingand Financing Payments OperatingandFinancingPayments	2319000	USD
CY2018	sui	Operatingand Financing Payments OperatingandFinancingPayments	3460000	USD
CY2017	sui	Operatingand Financing Payments OperatingandFinancingPayments	3303000	USD
CY2019Q4	sui	Lessee Operating Lease Lease Not Yet Commenced Value LesseeOperatingLeaseLeaseNotYetCommencedValue	2900000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Lease Not Yet Commenced Term Of Contract1 LesseeOperatingLeaseLeaseNotYetCommencedTermOfContract1	P7Y
CY2019Q4	sui	Percentof Operating Leases Where Companyisthe Lessor PercentofOperatingLeasesWhereCompanyistheLessor	0.95
CY2019Q4	sui	Percentof Investment Property Netonthe Consolidated Balance Sheets PercentofInvestmentPropertyNetontheConsolidatedBalanceSheets	0.95
CY2019Q1	us-gaap	Net Rentable Area NetRentableArea	103100	sqft
CY2019Q4	sui	Ratioof Sharesto Common Stock Numerator RatioofSharestoCommonStockNumerator	100.00	USD
CY2019Q4	sui	Ratioof Sharesto Common Stock Denominator RatioofSharestoCommonStockDenominator	145.00	USD
CY2020Q1	sui	Numberof Shares Amended Under Revised Partnership Agreement NumberofSharesAmendedUnderRevisedPartnershipAgreement	270000	shares
CY2020Q1	sui	Units Outstanding General Partnership UnitsOutstandingGeneralPartnership	1283819	shares
CY2020Q1	sui	Numberof Shares Amended Under Revised Partnership Agreement NumberofSharesAmendedUnderRevisedPartnershipAgreement	270000	shares
CY2020Q1	sui	General Partnership Annual Distribution Rate Percent GeneralPartnershipAnnualDistributionRatePercent	0.038
CY2019Q4	sui	General Partnership Annual Distribution Rate Percent GeneralPartnershipAnnualDistributionRatePercent	0.065
CY2019Q4	srt	Real Estate And Accumulated Depreciation Amount Of Encumbrances RealEstateAndAccumulatedDepreciationAmountOfEncumbrances	3188472000	USD
CY2019Q4	us-gaap	Real Estate And Accumulated Depreciation Initial Cost Of Land RealEstateAndAccumulatedDepreciationInitialCostOfLand	1379317000	USD
CY2019Q4	us-gaap	Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements	5238831000	USD
CY2019Q4	us-gaap	Sec Schedule Iii Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Land SECScheduleIIIRealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionLand	34962000	USD
CY2019Q4	us-gaap	Sec Schedule Iii Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Buildings And Improvements SECScheduleIIIRealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionBuildingsAndImprovements	2020697000	USD
CY2019Q4	us-gaap	Real Estate And Accumulated Depreciation Carrying Amount Of Land RealEstateAndAccumulatedDepreciationCarryingAmountOfLand	1414279000	USD
CY2019Q4	us-gaap	Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements	7505321000	USD
CY2019Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	8919600000	USD
CY2019Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	1686980000	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
CY2016Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	6496339000	USD
CY2019	sui	Real Estate Other Acquisitions And Improvements RealEstateOtherAcquisitionsAndImprovements	930668000	USD
CY2018	sui	Real Estate Other Acquisitions And Improvements RealEstateOtherAcquisitionsAndImprovements	414840000	USD
CY2017	sui	Real Estate Other Acquisitions And Improvements RealEstateOtherAcquisitionsAndImprovements	204375000	USD
CY2019	us-gaap	Real Estate Other Additions RealEstateOtherAdditions	281808000	USD
CY2018	us-gaap	Real Estate Other Additions RealEstateOtherAdditions	152672000	USD
CY2017	us-gaap	Real Estate Other Additions RealEstateOtherAdditions	88331000	USD
CY2019	us-gaap	Real Estate Improvements RealEstateImprovements	233984000	USD
CY2018	us-gaap	Real Estate Improvements RealEstateImprovements	205006000	USD
CY2017	us-gaap	Real Estate Improvements RealEstateImprovements	168315000	USD
CY2019	us-gaap	Real Estate Other Deductions RealEstateOtherDeductions	0	USD
CY2018	us-gaap	Real Estate Other Deductions RealEstateOtherDeductions	0	USD
CY2017	us-gaap	Real Estate Other Deductions RealEstateOtherDeductions	10511000	USD
CY2019	sui	Real Estate Dispositions And Other RealEstateDispositionsAndOther	87806000	USD
CY2018	sui	Real Estate Dispositions And Other RealEstateDispositionsAndOther	94451000	USD
CY2017	sui	Real Estate Dispositions And Other RealEstateDispositionsAndOther	63970000	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
CY2018Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	1442630000	USD
CY2017Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	1237525000	USD
CY2016Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	1026858000	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
CY2017	us-gaap	Sec Schedule Iii Real Estate Accumulated Depreciation Depreciation Expense SECScheduleIIIRealEstateAccumulatedDepreciationDepreciationExpense	236422000	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
CY2017	us-gaap	Real Estate Accumulated Depreciation Other Deductions RealEstateAccumulatedDepreciationOtherDeductions	405000	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
CY2017	sui	Real Estate Accumulated Depreciation Dispositions And Other RealEstateAccumulatedDepreciationDispositionsAndOther	25350000	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

Files In Submission

Name	View Source	Status
0000912593-20-000041-index-headers.html	Edgar Link	pending
0000912593-20-000041-index.html	Edgar Link	pending
0000912593-20-000041.txt	Edgar Link	pending
0000912593-20-000041-xbrl.zip	Edgar Link	pending
exhibit211-listofsubsi.htm	Edgar Link	pending
exhibit231-consentofgr.htm	Edgar Link	pending
exhibit311-12312019ceo.htm	Edgar Link	pending
exhibit312-12312019cfo.htm	Edgar Link	pending
exhibit321-12312019ceo.htm	Edgar Link	pending
exhibit41-descriptiono.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
item5sunperformance.jpg	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending
sui-20191231.xsd	Edgar Link	pending
sui-20191231_cal.xml	Edgar Link	unprocessable
sui-20191231_def.xml	Edgar Link	unprocessable
sui-20191231_lab.xml	Edgar Link	unprocessable
sui-20191231_pre.xml	Edgar Link	unprocessable
sui2019123110-k.htm	Edgar Link	pending
sui2019123110-k_htm.xml	Edgar Link	completed

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$SUI
SUN COMMUNITIES INC Stock $sui

2019 Q3 Form 10-K Financial Statement

#000091259320000041 Filed on February 20, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SUI SUN COMMUNITIES INC Stock $sui

2019 Q3 Form 10-K Financial Statement

#000091259320000041 Filed on February 20, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SUI
SUN COMMUNITIES INC Stock $sui