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Earnings Per Common Share - Additional Information (Detail) - USD ($)
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Average share price (in dollars per share) $ 104.13 $ 96.05  
Exchangeable senior notes, net $ 571,321,000   $ 569,513,000
Exchangeable Senior Notes 3.125% due 2035 (the 2015 Notes)      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Exchangeable senior notes, net $ 575,000,000    
Debt stated interest rate 3.125%    
Exchange price (in dollars per share) $ 91.46    
Shares related to the Notes included in the computation for diluted earnings per share (in shares) 764,703 226,527  
Series A Units      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Exchangeable preferred operating partnership units settled in cash, minimum $ 101,700,000    
Stock Options      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Anti-dilutive securities excluded from computation of earnings per common share (in shares) 0 0