Quarterly report pursuant to Section 13 or 15(d)

Unsecured Line of Credit and Term Notes - Additional Information (Detail)

v3.22.1
Unsecured Line of Credit and Term Notes - Additional Information (Detail) - USD ($)
3 Months Ended
Oct. 07, 2021
Sep. 23, 2020
Jun. 03, 2019
Dec. 07, 2017
Jul. 21, 2016
Jun. 20, 2016
Apr. 08, 2014
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Debt Instrument [Line Items]                    
Amount available on unsecured revolving line of credit               $ 364,900,000    
Unamortized senior term note discount               10,786,000   $ 11,154,000
Amortization expense related to deferred debt issuance costs               $ 1,328,000 $ 1,062,000  
Maximum [Member]                    
Debt Instrument [Line Items]                    
Leverage ratio percentage               60.00%    
Indenture covenant percentage on unencumbered assets               150.00%    
Minimum [Member]                    
Debt Instrument [Line Items]                    
Interest coverage ratio on debt               1.5    
Secured Debt [Member] | Maximum [Member]                    
Debt Instrument [Line Items]                    
Leverage ratio percentage               40.00%    
Term Note [Member]                    
Debt Instrument [Line Items]                    
Debt instrument variable interest rate               1.45%   1.10%
Senior Term Note Due October 15, 2031 [Member] | Unsecured Senior Notes [Member]                    
Debt Instrument [Line Items]                    
Debt instrument principal amount $ 600,000,000                  
Debt instrument,maturity date Oct. 15, 2031                  
Debt instrument stated interest rate 2.40%                  
Debt instrument percentage discount to par 0.917%                  
Debt instrument, interest payable description               Interest on the 2031 Senior Notes is payable semi-annually in arrears on each April 15 and October 15, commencing with April 15, 2022.    
Unamortized senior term note discount $ 5,500,000                  
Underwriting discount and other offering expenses 5,100,000                  
Proceeds from senior notes, net $ 589,400,000                  
Senior Term Note Due October 15, 2030 [Member] | Unsecured Senior Notes [Member]                    
Debt Instrument [Line Items]                    
Debt instrument principal amount   $ 400,000,000                
Debt instrument,maturity date   Oct. 15, 2030                
Debt instrument stated interest rate   2.20%                
Debt instrument percentage discount to par   0.476%                
Debt instrument, interest payable description               Interest on the 2030 Senior Notes is payable semi-annually in arrears on each April 15 and October 15.    
Unamortized senior term note discount   $ 1,900,000                
Underwriting discount and other offering expenses   3,500,000                
Proceeds from senior notes, net   $ 394,600,000                
Senior Term Note Due June 15, 2029 [Member] | Unsecured Senior Notes [Member]                    
Debt Instrument [Line Items]                    
Debt instrument principal amount     $ 350,000,000              
Debt instrument,maturity date     Jun. 15, 2029              
Debt instrument stated interest rate     4.00%              
Debt instrument percentage discount to par     0.524%              
Debt instrument, interest payable description               Interest on the 2029 Senior Notes is payable semi-annually in arrears on each June 15 and December 15.    
Unamortized senior term note discount     $ 1,800,000              
Underwriting discount and other offering expenses     3,100,000              
Proceeds from senior notes, net     $ 345,100,000              
Senior Term Note Due December 15, 2027 [Member] | Unsecured Senior Notes [Member]                    
Debt Instrument [Line Items]                    
Debt instrument principal amount       $ 450,000,000            
Debt instrument,maturity date       Dec. 15, 2027            
Debt instrument stated interest rate       3.875%            
Debt instrument percentage discount to par       0.477%            
Debt instrument, interest payable description               Interest on the 2027 Senior Notes is payable semi-annually in arrears on each June 15 and December 15.    
Unamortized senior term note discount       $ 2,100,000            
Underwriting discount and other offering expenses       4,000,000.0            
Proceeds from senior notes, net       $ 443,900,000            
Senior Term Note Due July 1, 2026 [Member] | Unsecured Senior Notes [Member]                    
Debt Instrument [Line Items]                    
Debt instrument principal amount           $ 600,000,000        
Debt instrument,maturity date           Jul. 01, 2026        
Debt instrument stated interest rate           3.50%        
Debt instrument percentage discount to par           0.553%        
Debt instrument, interest payable description               Interest on the 2026 Senior Notes is payable semi-annually in arrears on each January 1 and July 1.    
Unamortized senior term note discount           $ 3,300,000        
Underwriting discount and other offering expenses           5,500,000        
Proceeds from senior notes, net           $ 591,200,000        
Term Note Due July 21, 2028 [Member]                    
Debt Instrument [Line Items]                    
Debt instrument,maturity date         Jul. 21, 2028          
Debt instrument stated interest rate         3.67%          
Additional secured term note         $ 200,000,000          
Term Note Due April 8, 2024 [Member]                    
Debt Instrument [Line Items]                    
Debt instrument,maturity date             Apr. 08, 2024      
Debt instrument stated interest rate             4.533%      
Additional secured term note             $ 175,000,000      
Term Note Due April 8, 2024 [Member] | Maximum [Member]                    
Debt Instrument [Line Items]                    
Debt instrument stated interest rate             6.283%      
Senior Notes and Term Notes [Member]                    
Debt Instrument [Line Items]                    
Amortization expense related to deferred debt issuance costs               $ 700,000 $ 600,000  
Revolving Credit Facility [Member]                    
Debt Instrument [Line Items]                    
Revolving credit limit               $ 500,000,000    
Line of credit facility, expiration date               Mar. 10, 2023    
Facility fee               0.15%    
Interest rate, line of credit facility               1.40%   1.05%
Revolving Credit Facility [Member] | LIBOR [Member]                    
Debt Instrument [Line Items]                    
Basis spread over LIBOR               0.95%    
Revolving Credit Facility [Member] | Term Note [Member]                    
Debt Instrument [Line Items]                    
Revolving credit limit               $ 900,000,000    
Revolving Credit Facility [Member] | Term Note Due June 4, 2020 [Member]                    
Debt Instrument [Line Items]                    
Debt instrument principal amount               $ 100,000,000    
Debt instrument,maturity date               Jun. 04, 2020    
Revolving Credit Facility [Member] | Term Note Due June 4, 2020 [Member] | LIBOR [Member]                    
Debt Instrument [Line Items]                    
Basis spread over LIBOR               1.00%