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Income Taxes and Distributions (Details Textuals) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Income Tax Textuals [Line Items]        
Income tax provision $ (1,267,000)us-gaap_IncomeTaxExpenseBenefit $ 7,491,000us-gaap_IncomeTaxExpenseBenefit $ 7,612,000us-gaap_IncomeTaxExpenseBenefit  
Deferred Tax Assets (12,508,000)us-gaap_DeferredTaxAssetsNet (19,667,000)us-gaap_DeferredTaxAssetsNet (1,419,000)us-gaap_DeferredTaxAssetsNet  
NOL Carryforwards 378,791,000us-gaap_OperatingLossCarryforwards      
Unrecognized Tax Benefits 857,000us-gaap_UnrecognizedTaxBenefits 6,413,000us-gaap_UnrecognizedTaxBenefits 6,098,000us-gaap_UnrecognizedTaxBenefits  
Expensed tax interest 137,000us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense      
Expensed tax penalties 253,000us-gaap_IncomeTaxExaminationPenaltiesExpense      
Valuation allowance 85,207,000us-gaap_DeferredTaxAssetsValuationAllowance 71,955,000us-gaap_DeferredTaxAssetsValuationAllowance 12,199,000us-gaap_DeferredTaxAssetsValuationAllowance 2,965,000us-gaap_DeferredTaxAssetsValuationAllowance
Percentage of taxable income to be distributed to stockholders for federal tax purposes 90.00%hcn_PercentageOfTaxableIncomeToBeDistributedToStockholdersForFederalTaxPurposes      
Percentage of net capital gains on taxable income distributed to stockholders 100.00%hcn_PercentageOfCapitalGainsOnTaxableIncomeDistributedToStockholders      
Percentage of federal excise tax on real estate investment trusts that do not distribute income 4.00%hcn_PercentageOfFederalExciseTaxOnRealEstateInvestmentTrustsThatDoNotDistributeIncome      
International [Member]        
Income Tax Textuals [Line Items]        
Income tax provision (6,069,000)us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_IncomeTaxAuthorityAxis
= hcn_InternationalMember
(484,000)us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_IncomeTaxAuthorityAxis
= hcn_InternationalMember
596,000us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_IncomeTaxAuthorityAxis
= hcn_InternationalMember
 
Canada [Member]        
Income Tax Textuals [Line Items]        
NOL Carryforwards 32,085,000us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= hcn_CanadaMember
50,958,000us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= hcn_CanadaMember
4,275,000us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= hcn_CanadaMember
 
Excluding interest and penalties [Member]        
Income Tax Textuals [Line Items]        
Unrecognized Tax Benefits 6,976,000us-gaap_UnrecognizedTaxBenefits
/ us-gaap_IncomeTaxAuthorityAxis
= hcn_ExcludingInterestAndPenaltiesMember
     
United Kingdom [Member]        
Income Tax Textuals [Line Items]        
NOL Carryforwards $ 177,079,000us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= hcn_UnitedKingdomMember
$ 238,741,000us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= hcn_UnitedKingdomMember