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Debt - Additional Information (Detail)
 12 Months Ended
Apr. 19, 2022
USD ($)
Oct. 07, 2021
USD ($)
Apr. 15, 2021
USD ($)
Mar. 17, 2021
USD ($)
Property
Dec. 31, 2022
USD ($)
Property
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Jun. 01, 2022
USD ($)
May 25, 2022
USD ($)
Mar. 16, 2021
USD ($)
Debt Instrument [Line Items]                    
Weighted average interest rate on debt         5.40%          
Loss on extinguishment of debt         $ (2,393,475) $ (2,444,788) $ 0      
Initial maximum amount available   $ 700,000,000                
Number of operating properties | Property         99          
Debt Instrument Carrying Amount         $ 1,072,958,927          
S S G T I I Merger Agreement Member                    
Debt Instrument [Line Items]                    
Number of operating properties | Property         10          
Debt Instrument Carrying Amount               $ 75,100,000    
Key Bank [Member]                    
Debt Instrument [Line Items]                    
Initial maximum amount available       $ 850,000,000           $ 500,000,000
Outstanding balance on credit facility       500,000,000            
Additional amount available under credit facility       350,000,000            
Proceeds from line of credit       451,000,000            
Minimum                    
Debt Instrument [Line Items]                    
Credit facility cross default provision amount       75,000,000            
KeyBank SST IV CMBS Loan                    
Debt Instrument [Line Items]                    
Debt Instrument Carrying Amount       $ 40,500,000            
Number of properties encumbered | Property       7            
Debt instrument, maturity date       Feb. 01, 2030            
SST IV TCF Loan                    
Debt Instrument [Line Items]                    
Number of operating properties | Property         5          
Debt Instrument Carrying Amount       $ 40,800,000 $ 0 [1] $ 40,782,500 [1]        
2032 Private Placement Notes                    
Debt Instrument [Line Items]                    
Debt instrument, maturity date Apr. 19, 2032                  
Aggregate principal amount of notes issued $ 75,000,000               $ 75,000,000  
Interest Accruing on Notes 5.28%                  
Prepayment of Notes 100.00%                  
Interest rate 4.53%                  
2032 Private Placement Notes | 4.53 Senior Notes [Member]                    
Debt Instrument [Line Items]                    
Debt issued $ 150,000,000                  
2032 Private Placement Notes | Maximum                    
Debt Instrument [Line Items]                    
Ratio of Total Indebtedness 0.0700                  
Leverage Ratio 7.00%                  
2032 Private Placement Notes | Minimum                    
Debt Instrument [Line Items]                    
Ratio of Total Indebtedness 0.0100                  
Leverage Ratio 1.00%                  
Prepayment of Notes 5.00%                  
Midland North Carolina CMBS Loan                    
Debt Instrument [Line Items]                    
Number of operating properties | Property         11          
Credit Facility Revolver                    
Debt Instrument [Line Items]                    
Line of credit facility, annual unused fee         230.00%          
Increased the principal borrowing amount   200,000,000                
Line of credit facility, current borrowing capacity   450,000,000     $ 450,000,000          
Amount borrowed under the credit facility         $ 368,200,000          
Credit Facility Revolver | Key Bank [Member]                    
Debt Instrument [Line Items]                    
Outstanding balance on credit facility       $ 250,000,000            
Maturity date       Mar. 17, 2024            
Line of credit facility, term of extension options       1 year            
Debt instrument, description of variable rate basis         165 basis points spread over Daily Simple SOFR plus an additional 10 basis points (the SOFR Index Adjustment) or 30-day CDOR          
Line of credit facility, current borrowing capacity   700,000,000                
Credit Facility Revolver | Maximum | Key Bank [Member]                    
Debt Instrument [Line Items]                    
Line of credit facility, annual unused fee         0.25%          
Increased the principal borrowing amount   450,000,000                
Credit Facility Revolver | Maximum | Key Bank [Member] | Letter of Credit                    
Debt Instrument [Line Items]                    
Credit facility sublimits       $ 25,000,000            
Credit Facility Revolver | Maximum | Key Bank [Member] | Swingline Loans                    
Debt Instrument [Line Items]                    
Credit facility sublimits       25,000,000            
Credit Facility Revolver | Minimum | Key Bank [Member]                    
Debt Instrument [Line Items]                    
Line of credit facility, annual unused fee         0.15%          
Increased the principal borrowing amount   200,000,000                
Credit Facility Term Loan                    
Debt Instrument [Line Items]                    
Line of credit facility, annual unused fee         225.00%          
Line of credit facility, current borrowing capacity         $ 250,000,000          
Amount borrowed under the credit facility         $ 250,000,000          
Credit Facility Term Loan | Key Bank [Member]                    
Debt Instrument [Line Items]                    
Outstanding balance on credit facility       $ 250,000,000            
Maturity date       Mar. 17, 2026            
Line of credit facility, term of extension options       0 years            
Debt instrument, description of variable rate basis         160 basis points spread over Daily Simple SOFR (as defined in the Credit Facility Amendment) plus an additional 10 basis points (the "SOFR Index Adjustment" as defined in the Credit Facility Amendment) or 30-day Canadian dollar offered rate ("CDOR")          
Credit facility agreement                    
Debt Instrument [Line Items]                    
Line of credit facility, annual unused fee         60.00%          
Accordion Feature                    
Debt Instrument [Line Items]                    
Initial maximum amount available   1,050,000,000.00                
Additional amount available under credit facility   $ 350,000,000                
BMO Loan | Oakville III Property                    
Debt Instrument [Line Items]                    
Proceeds from line of credit     $ 16,300,000              
BMO Loan | Oakville III Property | CDOR                    
Debt Instrument [Line Items]                    
Interest rate     2.25%              
[1] On March 17, 2021, in connection with the SST IV Merger, we assumed a term loan with TCF National Bank, a national banking association (“TCF”), as lead arranger and administrative agent for up to $40.8 million (the “SST IV TCF Loan”). The SST IV TCF Loan was secured by a first mortgage on each of the Ocoee Property, the Ardrey Kell Property, the Surprise Property, the Escondido Property, and the Punta Gorda Property (the “SST IV TCF Properties”). This loan was fully paid off on April 28, 2022 in the amount of $40.8 million. There were no prepayment penalties for this pay off.