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Income Taxes - Additional Information (Detail) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Income Taxes [Line Items]      
Percentage of distributed taxable income to qualify as a REIT 90.00%    
Number of years the Company distributed sufficient taxable income in order to meet REIT distribution requirements 3 years    
U.S. federal income taxes $ 0    
U.S. federal excise taxes 0    
Number of subsequent taxable years 4 years    
Tax cost basis of assets 10,400,000,000 8,700,000,000 8,500,000,000
Net refund recorded     500,000
Net payment 1,900,000 1,100,000  
Net deferred tax assets 86,500,000 81,500,000  
Net operating loss carryforwards 36,700,000    
Expiry of net operating loss carryforwards 2022 through 2033    
Puerto Rico loss carryforwards $ 44,700,000    
Puerto Rico and TRS [Member]
      
Income Taxes [Line Items]      
Term of cumulative pretax book loss 3 years