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Transactions with Affiliates - Additional Information (Detail)
1 Months Ended 12 Months Ended
Aug. 31, 2019
USD ($)
$ / shares
shares
Dec. 31, 2021
USD ($)
Facility
Dec. 31, 2020
USD ($)
shares
Dec. 31, 2019
USD ($)
Related Party Transaction [Line Items]        
Number of lease facilities from related parties occupied on monthly or contractual basis | Facility   30    
Insurance, claims and other receivables   $ 20,400,000 $ 13,300,000  
Due to affiliates   17,839,000 17,093,000  
Due from affiliates   807,000 1,224,000  
Proceeds from the sale of property and equipment   5,605,000 4,189,000 $ 11,152,000
Land value   345,583,000 $ 364,795,000  
Tender offer expire date Sep. 13, 2019      
Maximum [Member]        
Related Party Transaction [Line Items]        
Percentage of additional repurchase on outstanding shares 2.00%      
Common stock [Member]        
Related Party Transaction [Line Items]        
Shares accepted by company under tender offer, shares | shares 1,101,597      
Tender offer final purchase price, per share | $ / shares $ 22.50      
Tender offer, total purchase price $ 24,800,000      
Common stock [Member] | Maximum [Member]        
Related Party Transaction [Line Items]        
Number of shares available for authorized to repurchase | shares 600,000      
Director, H. E. "Scott" Wolfe [Member]        
Related Party Transaction [Line Items]        
Number of shares of restricted stock, exercised right of first refusal to acquire | shares     6,250  
Value of restricted stock, exercised right of first refusal to acquire     $ 137,800  
Former Director [Member] | Common stock [Member]        
Related Party Transaction [Line Items]        
Shares accepted by company under tender offer, shares | shares 600,000      
Mr. Jude Beres, Chief Financial Officer [Member] | Common stock [Member]        
Related Party Transaction [Line Items]        
Shares accepted by company under tender offer, shares | shares 10,000      
Affiliates [Member]        
Related Party Transaction [Line Items]        
Cost of purchase from an affiliate     618,000 0
Affiliates [Member] | Real Property Improvements [Member]        
Related Party Transaction [Line Items]        
Cost of purchase from an affiliate   $ 956,000 $ 3,000,000.0  
Affiliates [Member] | Land [Member]        
Related Party Transaction [Line Items]        
Proceeds from the sale of property and equipment       2,500,000
Land value       2,400,000
Gain on sale of land       $ 100,000